view OMSSAAdapter.xml @ 4:6ead64a594bd draft default tip

planemo upload for repository https://github.com/bgruening/galaxytools/tree/master/tools/openms commit 7a5239910fda9ed90cca286a38855703b40b1b56-dirty
author bgruening
date Wed, 27 Jan 2016 10:06:49 -0500
parents 3d84209d3178
children
line wrap: on
line source

<?xml version="1.0" encoding="UTF-8"?>
  <!--This is a configuration file for the integration of a tools into Galaxy (https://galaxyproject.org/). This file was automatically generated using CTD2Galaxy.-->
  <!--Proposed Tool Section: [Identification]-->
  <tool id="OMSSAAdapter" name="OMSSAAdapter" version="2.0.0">
    <description>Annotates MS/MS spectra using OMSSA.</description>
    <macros>
      <token name="@EXECUTABLE@">OMSSAAdapter</token>
      <import>macros.xml</import>
    </macros>
    <expand macro="references"/>
    <expand macro="stdio"/>
    <expand macro="requirements"/>
    <command>OMSSAAdapter

#if $param_in:
  -in $param_in
#end if
#if $param_out:
  -out $param_out
#end if
#if $param_precursor_mass_tolerance:
  -precursor_mass_tolerance $param_precursor_mass_tolerance
#end if
#if $param_precursor_mass_tolerance_unit_ppm:
  -precursor_mass_tolerance_unit_ppm
#end if
#if $param_fragment_mass_tolerance:
  -fragment_mass_tolerance $param_fragment_mass_tolerance
#end if
#if $param_database:
  -database $param_database
#end if
#if $param_min_precursor_charge:
  -min_precursor_charge $param_min_precursor_charge
#end if
#if $param_max_precursor_charge:
  -max_precursor_charge $param_max_precursor_charge
#end if

#if $rep_param_fixed_modifications:
-fixed_modifications
  #for token in $rep_param_fixed_modifications:
    #if &quot; &quot; in str(token):
      &quot;$token.param_fixed_modifications&quot;
    #else
      $token.param_fixed_modifications
    #end if
  #end for
#end if

#if $rep_param_variable_modifications:
-variable_modifications
  #for token in $rep_param_variable_modifications:
    #if &quot; &quot; in str(token):
      &quot;$token.param_variable_modifications&quot;
    #else
      $token.param_variable_modifications
    #end if
  #end for
#end if
-omssa_executable omssa
#if $param_v:
  -v $param_v
#end if
#if $param_enzyme:
  -enzyme
  #if &quot; &quot; in str($param_enzyme):
    &quot;$param_enzyme&quot;
  #else
    $param_enzyme
  #end if
#end if
#if $param_hl:
  -hl $param_hl
#end if
#if $param_he:
  -he $param_he
#end if
-threads \${GALAXY_SLOTS:-24}
#if $adv_opts.adv_opts_selector=='advanced':
    #if $adv_opts.param_pc:
  -pc $adv_opts.param_pc
#end if
    #if $adv_opts.param_hs:
  -hs $adv_opts.param_hs
#end if
    #if $adv_opts.param_tez:
  -tez $adv_opts.param_tez
#end if
    #if $adv_opts.param_tom:
  -tom $adv_opts.param_tom
#end if
    #if $adv_opts.param_tem:
  -tem $adv_opts.param_tem
#end if
    #if $adv_opts.param_tex:
  -tex $adv_opts.param_tex
#end if
    #if $adv_opts.param_zt:
  -zt $adv_opts.param_zt
#end if
    #if $adv_opts.param_z1:
  -z1 $adv_opts.param_z1
#end if
    #if $adv_opts.param_zc:
  -zc $adv_opts.param_zc
#end if
    #if $adv_opts.param_zcc:
  -zcc $adv_opts.param_zcc
#end if
    #if $adv_opts.param_zoh:
  -zoh $adv_opts.param_zoh
#end if
    #if $adv_opts.param_no:
  -no $adv_opts.param_no
#end if
    #if $adv_opts.param_nox:
  -nox $adv_opts.param_nox
#end if
    #if $adv_opts.param_i:
  -i     &quot;$adv_opts.param_i&quot;
#end if
    #if $adv_opts.param_sp:
  -sp $adv_opts.param_sp
#end if
    #if $adv_opts.param_sb1:
  -sb1 $adv_opts.param_sb1
#end if
    #if $adv_opts.param_sct:
  -sct $adv_opts.param_sct
#end if
    #if $adv_opts.param_x:
  -x     &quot;$adv_opts.param_x&quot;
#end if
    #if $adv_opts.param_hm:
  -hm $adv_opts.param_hm
#end if
    #if $adv_opts.param_ht:
  -ht $adv_opts.param_ht
#end if
    #if $adv_opts.param_mm:
  -mm $adv_opts.param_mm
#end if
    #if $adv_opts.param_mnm:
  -mnm
#end if
    #if $adv_opts.param_is:
  -is $adv_opts.param_is
#end if
    #if $adv_opts.param_ir:
  -ir $adv_opts.param_ir
#end if
    #if $adv_opts.param_ii:
  -ii $adv_opts.param_ii
#end if
    #if $adv_opts.param_chunk_size:
  -chunk_size $adv_opts.param_chunk_size
#end if
    #if $adv_opts.param_force:
  -force
#end if
#end if
</command>
    <inputs>
      <param format="mzml" help="(-in) " label="Input file" name="param_in" optional="False" type="data"/>
      <param help="(-precursor_mass_tolerance) " label="Precursor mass tolerance (Default: Dalton)" name="param_precursor_mass_tolerance" type="float" value="1.5"/>
      <param checked="false" falsevalue="" help="(-precursor_mass_tolerance_unit_ppm) " label="If this flag is set, ppm is used as precursor mass tolerance unit" name="param_precursor_mass_tolerance_unit_ppm" optional="True" truevalue="-precursor_mass_tolerance_unit_ppm" type="boolean"/>
      <param help="(-fragment_mass_tolerance) " label="Fragment mass error in Dalton" name="param_fragment_mass_tolerance" type="float" value="0.3"/>
      <param format="fasta" help="(-database) e.g. 'SwissProt.fasta.psq'. If the filename does not end in '.psq' (e.g., SwissProt.fasta) the psq suffix will be added automatically. Non-existing relative file-names are looked up via'OpenMS.ini:id_db_dir'" label="NCBI formatted FASTA files. The .psq filename should be given," name="param_database" optional="False" type="data"/>
      <param help="(-min_precursor_charge) " label="Minimum precursor ion charge" name="param_min_precursor_charge" type="integer" value="1"/>
      <param help="(-max_precursor_charge) " label="Maximum precursor ion charge" name="param_max_precursor_charge" type="integer" value="3"/>
      <repeat min="0" name="rep_param_fixed_modifications" title="param_fixed_modifications">
        <param help="(-fixed_modifications) e.g. 'Carbamidomethyl (C)' or 'Oxidation (M)'" label="Fixed modifications, specified using UniMod (www.unimod.org) terms," name="param_fixed_modifications" optional="True" type="select">
          <option value="2-dimethylsuccinyl (C)">2-dimethylsuccinyl (C)</option>
          <option value="2-monomethylsuccinyl (C)">2-monomethylsuccinyl (C)</option>
          <option value="2-nitrobenzyl (Y)">2-nitrobenzyl (Y)</option>
          <option value="2-succinyl (C)">2-succinyl (C)</option>
          <option value="2HPG (R)">2HPG (R)</option>
          <option value="3-deoxyglucosone (R)">3-deoxyglucosone (R)</option>
          <option value="3-phosphoglyceryl (K)">3-phosphoglyceryl (K)</option>
          <option value="3sulfo (N-term)">3sulfo (N-term)</option>
          <option value="4-ONE (C)">4-ONE (C)</option>
          <option value="4-ONE (H)">4-ONE (H)</option>
          <option value="4-ONE (K)">4-ONE (K)</option>
          <option value="4-ONE+Delta:H(-2)O(-1) (C)">4-ONE+Delta:H(-2)O(-1) (C)</option>
          <option value="4-ONE+Delta:H(-2)O(-1) (H)">4-ONE+Delta:H(-2)O(-1) (H)</option>
          <option value="4-ONE+Delta:H(-2)O(-1) (K)">4-ONE+Delta:H(-2)O(-1) (K)</option>
          <option value="4AcAllylGal (C)">4AcAllylGal (C)</option>
          <option value="ADP-Ribosyl (C)">ADP-Ribosyl (C)</option>
          <option value="ADP-Ribosyl (D)">ADP-Ribosyl (D)</option>
          <option value="ADP-Ribosyl (E)">ADP-Ribosyl (E)</option>
          <option value="ADP-Ribosyl (K)">ADP-Ribosyl (K)</option>
          <option value="ADP-Ribosyl (N)">ADP-Ribosyl (N)</option>
          <option value="ADP-Ribosyl (R)">ADP-Ribosyl (R)</option>
          <option value="ADP-Ribosyl (S)">ADP-Ribosyl (S)</option>
          <option value="AEBS (H)">AEBS (H)</option>
          <option value="AEBS (K)">AEBS (K)</option>
          <option value="AEBS (S)">AEBS (S)</option>
          <option value="AEBS (Y)">AEBS (Y)</option>
          <option value="AEC-MAEC (S)">AEC-MAEC (S)</option>
          <option value="AEC-MAEC (T)">AEC-MAEC (T)</option>
          <option value="AEC-MAEC:2H(4) (S)">AEC-MAEC:2H(4) (S)</option>
          <option value="AEC-MAEC:2H(4) (T)">AEC-MAEC:2H(4) (T)</option>
          <option value="AHA-Alkyne (M)">AHA-Alkyne (M)</option>
          <option value="AHA-Alkyne-KDDDD (M)">AHA-Alkyne-KDDDD (M)</option>
          <option value="AHA-SS (M)">AHA-SS (M)</option>
          <option value="AHA-SS_CAM (M)">AHA-SS_CAM (M)</option>
          <option value="AMTzHexNAc2 (N)">AMTzHexNAc2 (N)</option>
          <option value="AMTzHexNAc2 (S)">AMTzHexNAc2 (S)</option>
          <option value="AMTzHexNAc2 (T)">AMTzHexNAc2 (T)</option>
          <option value="AROD (C)">AROD (C)</option>
          <option value="AccQTag (K)">AccQTag (K)</option>
          <option value="AccQTag (N-term)">AccQTag (N-term)</option>
          <option value="Acetyl (C)">Acetyl (C)</option>
          <option value="Acetyl (H)">Acetyl (H)</option>
          <option value="Acetyl (K)">Acetyl (K)</option>
          <option value="Acetyl (N-term)">Acetyl (N-term)</option>
          <option value="Acetyl (S)">Acetyl (S)</option>
          <option value="Acetyl (T)">Acetyl (T)</option>
          <option value="Acetyl (Y)">Acetyl (Y)</option>
          <option value="Acetyl:13C(2) (K)">Acetyl:13C(2) (K)</option>
          <option value="Acetyl:2H(3) (H)">Acetyl:2H(3) (H)</option>
          <option value="Acetyl:2H(3) (K)">Acetyl:2H(3) (K)</option>
          <option value="Acetyl:2H(3) (N-term)">Acetyl:2H(3) (N-term)</option>
          <option value="Acetyl:2H(3) (S)">Acetyl:2H(3) (S)</option>
          <option value="Acetyl:2H(3) (T)">Acetyl:2H(3) (T)</option>
          <option value="Acetyl:2H(3) (Y)">Acetyl:2H(3) (Y)</option>
          <option value="Acetyldeoxyhypusine (K)">Acetyldeoxyhypusine (K)</option>
          <option value="Acetylhypusine (K)">Acetylhypusine (K)</option>
          <option value="Ahx2+Hsl (C-term)">Ahx2+Hsl (C-term)</option>
          <option value="Ala-&gt;Arg (A)">Ala-&gt;Arg (A)</option>
          <option value="Ala-&gt;Asn (A)">Ala-&gt;Asn (A)</option>
          <option value="Ala-&gt;Asp (A)">Ala-&gt;Asp (A)</option>
          <option value="Ala-&gt;Cys (A)">Ala-&gt;Cys (A)</option>
          <option value="Ala-&gt;Gln (A)">Ala-&gt;Gln (A)</option>
          <option value="Ala-&gt;Glu (A)">Ala-&gt;Glu (A)</option>
          <option value="Ala-&gt;Gly (A)">Ala-&gt;Gly (A)</option>
          <option value="Ala-&gt;His (A)">Ala-&gt;His (A)</option>
          <option value="Ala-&gt;Lys (A)">Ala-&gt;Lys (A)</option>
          <option value="Ala-&gt;Met (A)">Ala-&gt;Met (A)</option>
          <option value="Ala-&gt;Phe (A)">Ala-&gt;Phe (A)</option>
          <option value="Ala-&gt;Pro (A)">Ala-&gt;Pro (A)</option>
          <option value="Ala-&gt;Ser (A)">Ala-&gt;Ser (A)</option>
          <option value="Ala-&gt;Thr (A)">Ala-&gt;Thr (A)</option>
          <option value="Ala-&gt;Trp (A)">Ala-&gt;Trp (A)</option>
          <option value="Ala-&gt;Tyr (A)">Ala-&gt;Tyr (A)</option>
          <option value="Ala-&gt;Val (A)">Ala-&gt;Val (A)</option>
          <option value="Ala-&gt;Xle (A)">Ala-&gt;Xle (A)</option>
          <option value="Amidated (C-term)">Amidated (C-term)</option>
          <option value="Amidine (K)">Amidine (K)</option>
          <option value="Amidine (N-term)">Amidine (N-term)</option>
          <option value="Amidino (C)">Amidino (C)</option>
          <option value="Amino (Y)">Amino (Y)</option>
          <option value="Ammonia-loss (N)">Ammonia-loss (N)</option>
          <option value="Ammonia-loss (N-term C)">Ammonia-loss (N-term C)</option>
          <option value="Ammonium (C-term)">Ammonium (C-term)</option>
          <option value="Ammonium (D)">Ammonium (D)</option>
          <option value="Ammonium (E)">Ammonium (E)</option>
          <option value="Archaeol (C)">Archaeol (C)</option>
          <option value="Arg (N-term)">Arg (N-term)</option>
          <option value="Arg-&gt;Ala (R)">Arg-&gt;Ala (R)</option>
          <option value="Arg-&gt;Asn (R)">Arg-&gt;Asn (R)</option>
          <option value="Arg-&gt;Asp (R)">Arg-&gt;Asp (R)</option>
          <option value="Arg-&gt;Cys (R)">Arg-&gt;Cys (R)</option>
          <option value="Arg-&gt;Gln (R)">Arg-&gt;Gln (R)</option>
          <option value="Arg-&gt;Glu (R)">Arg-&gt;Glu (R)</option>
          <option value="Arg-&gt;GluSA (R)">Arg-&gt;GluSA (R)</option>
          <option value="Arg-&gt;Gly (R)">Arg-&gt;Gly (R)</option>
          <option value="Arg-&gt;His (R)">Arg-&gt;His (R)</option>
          <option value="Arg-&gt;Lys (R)">Arg-&gt;Lys (R)</option>
          <option value="Arg-&gt;Met (R)">Arg-&gt;Met (R)</option>
          <option value="Arg-&gt;Npo (R)">Arg-&gt;Npo (R)</option>
          <option value="Arg-&gt;Orn (R)">Arg-&gt;Orn (R)</option>
          <option value="Arg-&gt;Phe (R)">Arg-&gt;Phe (R)</option>
          <option value="Arg-&gt;Pro (R)">Arg-&gt;Pro (R)</option>
          <option value="Arg-&gt;Ser (R)">Arg-&gt;Ser (R)</option>
          <option value="Arg-&gt;Thr (R)">Arg-&gt;Thr (R)</option>
          <option value="Arg-&gt;Trp (R)">Arg-&gt;Trp (R)</option>
          <option value="Arg-&gt;Tyr (R)">Arg-&gt;Tyr (R)</option>
          <option value="Arg-&gt;Val (R)">Arg-&gt;Val (R)</option>
          <option value="Arg-&gt;Xle (R)">Arg-&gt;Xle (R)</option>
          <option value="Arg-loss (C-term R)">Arg-loss (C-term R)</option>
          <option value="Arg2PG (R)">Arg2PG (R)</option>
          <option value="Argbiotinhydrazide (R)">Argbiotinhydrazide (R)</option>
          <option value="Asn-&gt;Ala (N)">Asn-&gt;Ala (N)</option>
          <option value="Asn-&gt;Arg (N)">Asn-&gt;Arg (N)</option>
          <option value="Asn-&gt;Asp (N)">Asn-&gt;Asp (N)</option>
          <option value="Asn-&gt;Cys (N)">Asn-&gt;Cys (N)</option>
          <option value="Asn-&gt;Gln (N)">Asn-&gt;Gln (N)</option>
          <option value="Asn-&gt;Glu (N)">Asn-&gt;Glu (N)</option>
          <option value="Asn-&gt;Gly (N)">Asn-&gt;Gly (N)</option>
          <option value="Asn-&gt;His (N)">Asn-&gt;His (N)</option>
          <option value="Asn-&gt;Lys (N)">Asn-&gt;Lys (N)</option>
          <option value="Asn-&gt;Met (N)">Asn-&gt;Met (N)</option>
          <option value="Asn-&gt;Phe (N)">Asn-&gt;Phe (N)</option>
          <option value="Asn-&gt;Pro (N)">Asn-&gt;Pro (N)</option>
          <option value="Asn-&gt;Ser (N)">Asn-&gt;Ser (N)</option>
          <option value="Asn-&gt;Thr (N)">Asn-&gt;Thr (N)</option>
          <option value="Asn-&gt;Trp (N)">Asn-&gt;Trp (N)</option>
          <option value="Asn-&gt;Tyr (N)">Asn-&gt;Tyr (N)</option>
          <option value="Asn-&gt;Val (N)">Asn-&gt;Val (N)</option>
          <option value="Asn-&gt;Xle (N)">Asn-&gt;Xle (N)</option>
          <option value="Asp-&gt;Ala (D)">Asp-&gt;Ala (D)</option>
          <option value="Asp-&gt;Arg (D)">Asp-&gt;Arg (D)</option>
          <option value="Asp-&gt;Asn (D)">Asp-&gt;Asn (D)</option>
          <option value="Asp-&gt;Cys (D)">Asp-&gt;Cys (D)</option>
          <option value="Asp-&gt;Gln (D)">Asp-&gt;Gln (D)</option>
          <option value="Asp-&gt;Glu (D)">Asp-&gt;Glu (D)</option>
          <option value="Asp-&gt;Gly (D)">Asp-&gt;Gly (D)</option>
          <option value="Asp-&gt;His (D)">Asp-&gt;His (D)</option>
          <option value="Asp-&gt;Lys (D)">Asp-&gt;Lys (D)</option>
          <option value="Asp-&gt;Met (D)">Asp-&gt;Met (D)</option>
          <option value="Asp-&gt;Phe (D)">Asp-&gt;Phe (D)</option>
          <option value="Asp-&gt;Pro (D)">Asp-&gt;Pro (D)</option>
          <option value="Asp-&gt;Ser (D)">Asp-&gt;Ser (D)</option>
          <option value="Asp-&gt;Thr (D)">Asp-&gt;Thr (D)</option>
          <option value="Asp-&gt;Trp (D)">Asp-&gt;Trp (D)</option>
          <option value="Asp-&gt;Tyr (D)">Asp-&gt;Tyr (D)</option>
          <option value="Asp-&gt;Val (D)">Asp-&gt;Val (D)</option>
          <option value="Asp-&gt;Xle (D)">Asp-&gt;Xle (D)</option>
          <option value="Atto495Maleimide (C)">Atto495Maleimide (C)</option>
          <option value="BADGE (C)">BADGE (C)</option>
          <option value="BDMAPP (H)">BDMAPP (H)</option>
          <option value="BDMAPP (K)">BDMAPP (K)</option>
          <option value="BDMAPP (W)">BDMAPP (W)</option>
          <option value="BDMAPP (Y)">BDMAPP (Y)</option>
          <option value="BHAc (K)">BHAc (K)</option>
          <option value="BHT (C)">BHT (C)</option>
          <option value="BHT (H)">BHT (H)</option>
          <option value="BHT (K)">BHT (K)</option>
          <option value="BHTOH (C)">BHTOH (C)</option>
          <option value="BHTOH (H)">BHTOH (H)</option>
          <option value="BHTOH (K)">BHTOH (K)</option>
          <option value="BITC (C)">BITC (C)</option>
          <option value="BITC (K)">BITC (K)</option>
          <option value="BITC (N-term)">BITC (N-term)</option>
          <option value="BMOE (C)">BMOE (C)</option>
          <option value="BMP-piperidinol (C)">BMP-piperidinol (C)</option>
          <option value="BMP-piperidinol (M)">BMP-piperidinol (M)</option>
          <option value="Bacillosamine (N)">Bacillosamine (N)</option>
          <option value="Benzoyl (K)">Benzoyl (K)</option>
          <option value="Benzoyl (N-term)">Benzoyl (N-term)</option>
          <option value="Biotin (K)">Biotin (K)</option>
          <option value="Biotin (N-term)">Biotin (N-term)</option>
          <option value="Biotin-HPDP (C)">Biotin-HPDP (C)</option>
          <option value="Biotin-PEG-PRA (M)">Biotin-PEG-PRA (M)</option>
          <option value="Biotin-PEO-Amine (D)">Biotin-PEO-Amine (D)</option>
          <option value="Biotin-PEO-Amine (E)">Biotin-PEO-Amine (E)</option>
          <option value="Biotin-phenacyl (C)">Biotin-phenacyl (C)</option>
          <option value="Biotin-phenacyl (H)">Biotin-phenacyl (H)</option>
          <option value="Biotin-phenacyl (S)">Biotin-phenacyl (S)</option>
          <option value="Biotin:Cayman-10013 (C)">Biotin:Cayman-10013 (C)</option>
          <option value="Biotin:Cayman-10141 (C)">Biotin:Cayman-10141 (C)</option>
          <option value="Biotin:Invitrogen-M1602 (C)">Biotin:Invitrogen-M1602 (C)</option>
          <option value="Biotin:Sigma-B1267 (C)">Biotin:Sigma-B1267 (C)</option>
          <option value="Biotin:Thermo-21325 (K)">Biotin:Thermo-21325 (K)</option>
          <option value="Biotin:Thermo-21345 (Q)">Biotin:Thermo-21345 (Q)</option>
          <option value="Biotin:Thermo-21360 (C-term)">Biotin:Thermo-21360 (C-term)</option>
          <option value="Biotin:Thermo-21901+2H2O (C)">Biotin:Thermo-21901+2H2O (C)</option>
          <option value="Biotin:Thermo-21901+H2O (C)">Biotin:Thermo-21901+H2O (C)</option>
          <option value="Biotin:Thermo-21911 (C)">Biotin:Thermo-21911 (C)</option>
          <option value="Biotin:Thermo-33033 (N-term)">Biotin:Thermo-33033 (N-term)</option>
          <option value="Biotin:Thermo-33033-H (N-term)">Biotin:Thermo-33033-H (N-term)</option>
          <option value="Biotin:Thermo-88310 (K)">Biotin:Thermo-88310 (K)</option>
          <option value="Biotin:Thermo-88317 (S)">Biotin:Thermo-88317 (S)</option>
          <option value="Biotin:Thermo-88317 (Y)">Biotin:Thermo-88317 (Y)</option>
          <option value="BisANS (K)">BisANS (K)</option>
          <option value="Bodipy (C)">Bodipy (C)</option>
          <option value="Bromo (F)">Bromo (F)</option>
          <option value="Bromo (H)">Bromo (H)</option>
          <option value="Bromo (W)">Bromo (W)</option>
          <option value="Bromo (Y)">Bromo (Y)</option>
          <option value="Bromobimane (C)">Bromobimane (C)</option>
          <option value="Butyryl (K)">Butyryl (K)</option>
          <option value="C8-QAT (K)">C8-QAT (K)</option>
          <option value="C8-QAT (N-term)">C8-QAT (N-term)</option>
          <option value="CAF (N-term)">CAF (N-term)</option>
          <option value="CAMthiopropanoyl (K)">CAMthiopropanoyl (K)</option>
          <option value="CHDH (D)">CHDH (D)</option>
          <option value="CLIP_TRAQ_2 (K)">CLIP_TRAQ_2 (K)</option>
          <option value="CLIP_TRAQ_2 (N-term)">CLIP_TRAQ_2 (N-term)</option>
          <option value="CLIP_TRAQ_2 (Y)">CLIP_TRAQ_2 (Y)</option>
          <option value="CLIP_TRAQ_3 (K)">CLIP_TRAQ_3 (K)</option>
          <option value="CLIP_TRAQ_3 (N-term)">CLIP_TRAQ_3 (N-term)</option>
          <option value="CLIP_TRAQ_3 (Y)">CLIP_TRAQ_3 (Y)</option>
          <option value="CLIP_TRAQ_4 (K)">CLIP_TRAQ_4 (K)</option>
          <option value="CLIP_TRAQ_4 (N-term)">CLIP_TRAQ_4 (N-term)</option>
          <option value="CLIP_TRAQ_4 (Y)">CLIP_TRAQ_4 (Y)</option>
          <option value="Can-FP-biotin (S)">Can-FP-biotin (S)</option>
          <option value="Can-FP-biotin (T)">Can-FP-biotin (T)</option>
          <option value="Can-FP-biotin (Y)">Can-FP-biotin (Y)</option>
          <option value="Carbamidomethyl (C)">Carbamidomethyl (C)</option>
          <option value="Carbamidomethyl (D)">Carbamidomethyl (D)</option>
          <option value="Carbamidomethyl (E)">Carbamidomethyl (E)</option>
          <option value="Carbamidomethyl (H)">Carbamidomethyl (H)</option>
          <option value="Carbamidomethyl (K)">Carbamidomethyl (K)</option>
          <option value="Carbamidomethyl (N-term)">Carbamidomethyl (N-term)</option>
          <option value="Carbamidomethyl (S)">Carbamidomethyl (S)</option>
          <option value="Carbamidomethyl (T)">Carbamidomethyl (T)</option>
          <option value="Carbamidomethyl (Y)">Carbamidomethyl (Y)</option>
          <option value="CarbamidomethylDTT (C)">CarbamidomethylDTT (C)</option>
          <option value="Carbamyl (C)">Carbamyl (C)</option>
          <option value="Carbamyl (K)">Carbamyl (K)</option>
          <option value="Carbamyl (M)">Carbamyl (M)</option>
          <option value="Carbamyl (N-term)">Carbamyl (N-term)</option>
          <option value="Carbamyl (R)">Carbamyl (R)</option>
          <option value="Carbamyl (S)">Carbamyl (S)</option>
          <option value="Carbamyl (T)">Carbamyl (T)</option>
          <option value="Carbamyl (Y)">Carbamyl (Y)</option>
          <option value="Carbofuran (S)">Carbofuran (S)</option>
          <option value="Carboxy (D)">Carboxy (D)</option>
          <option value="Carboxy (E)">Carboxy (E)</option>
          <option value="Carboxy (K)">Carboxy (K)</option>
          <option value="Carboxy (W)">Carboxy (W)</option>
          <option value="Carboxyethyl (H)">Carboxyethyl (H)</option>
          <option value="Carboxyethyl (K)">Carboxyethyl (K)</option>
          <option value="Carboxymethyl (C)">Carboxymethyl (C)</option>
          <option value="Carboxymethyl (K)">Carboxymethyl (K)</option>
          <option value="Carboxymethyl (N-term)">Carboxymethyl (N-term)</option>
          <option value="Carboxymethyl (W)">Carboxymethyl (W)</option>
          <option value="Carboxymethyl:13C(2) (C)">Carboxymethyl:13C(2) (C)</option>
          <option value="CarboxymethylDMAP (N-term)">CarboxymethylDMAP (N-term)</option>
          <option value="CarboxymethylDTT (C)">CarboxymethylDTT (C)</option>
          <option value="Cation:Ag (C-term)">Cation:Ag (C-term)</option>
          <option value="Cation:Ag (D)">Cation:Ag (D)</option>
          <option value="Cation:Ag (E)">Cation:Ag (E)</option>
          <option value="Cation:Ca[II] (C-term)">Cation:Ca[II] (C-term)</option>
          <option value="Cation:Ca[II] (D)">Cation:Ca[II] (D)</option>
          <option value="Cation:Ca[II] (E)">Cation:Ca[II] (E)</option>
          <option value="Cation:Cu[I] (C-term)">Cation:Cu[I] (C-term)</option>
          <option value="Cation:Cu[I] (D)">Cation:Cu[I] (D)</option>
          <option value="Cation:Cu[I] (E)">Cation:Cu[I] (E)</option>
          <option value="Cation:Fe[II] (C-term)">Cation:Fe[II] (C-term)</option>
          <option value="Cation:Fe[II] (D)">Cation:Fe[II] (D)</option>
          <option value="Cation:Fe[II] (E)">Cation:Fe[II] (E)</option>
          <option value="Cation:K (C-term)">Cation:K (C-term)</option>
          <option value="Cation:K (D)">Cation:K (D)</option>
          <option value="Cation:K (E)">Cation:K (E)</option>
          <option value="Cation:Li (C-term)">Cation:Li (C-term)</option>
          <option value="Cation:Li (D)">Cation:Li (D)</option>
          <option value="Cation:Li (E)">Cation:Li (E)</option>
          <option value="Cation:Mg[II] (C-term)">Cation:Mg[II] (C-term)</option>
          <option value="Cation:Mg[II] (D)">Cation:Mg[II] (D)</option>
          <option value="Cation:Mg[II] (E)">Cation:Mg[II] (E)</option>
          <option value="Cation:Na (C-term)">Cation:Na (C-term)</option>
          <option value="Cation:Na (D)">Cation:Na (D)</option>
          <option value="Cation:Na (E)">Cation:Na (E)</option>
          <option value="Cation:Ni[II] (C-term)">Cation:Ni[II] (C-term)</option>
          <option value="Cation:Ni[II] (D)">Cation:Ni[II] (D)</option>
          <option value="Cation:Ni[II] (E)">Cation:Ni[II] (E)</option>
          <option value="Cation:Zn[II] (C-term)">Cation:Zn[II] (C-term)</option>
          <option value="Cation:Zn[II] (D)">Cation:Zn[II] (D)</option>
          <option value="Cation:Zn[II] (E)">Cation:Zn[II] (E)</option>
          <option value="Chlorination (Y)">Chlorination (Y)</option>
          <option value="Chlorpyrifos (S)">Chlorpyrifos (S)</option>
          <option value="Chlorpyrifos (T)">Chlorpyrifos (T)</option>
          <option value="Chlorpyrifos (Y)">Chlorpyrifos (Y)</option>
          <option value="CoenzymeA (C)">CoenzymeA (C)</option>
          <option value="CresylSaligeninPhosphate (H)">CresylSaligeninPhosphate (H)</option>
          <option value="CresylSaligeninPhosphate (K)">CresylSaligeninPhosphate (K)</option>
          <option value="CresylSaligeninPhosphate (R)">CresylSaligeninPhosphate (R)</option>
          <option value="CresylSaligeninPhosphate (S)">CresylSaligeninPhosphate (S)</option>
          <option value="CresylSaligeninPhosphate (T)">CresylSaligeninPhosphate (T)</option>
          <option value="CresylSaligeninPhosphate (Y)">CresylSaligeninPhosphate (Y)</option>
          <option value="Cresylphosphate (H)">Cresylphosphate (H)</option>
          <option value="Cresylphosphate (K)">Cresylphosphate (K)</option>
          <option value="Cresylphosphate (R)">Cresylphosphate (R)</option>
          <option value="Cresylphosphate (S)">Cresylphosphate (S)</option>
          <option value="Cresylphosphate (T)">Cresylphosphate (T)</option>
          <option value="Cresylphosphate (Y)">Cresylphosphate (Y)</option>
          <option value="Crotonaldehyde (C)">Crotonaldehyde (C)</option>
          <option value="Crotonaldehyde (H)">Crotonaldehyde (H)</option>
          <option value="Crotonaldehyde (K)">Crotonaldehyde (K)</option>
          <option value="Crotonyl (K)">Crotonyl (K)</option>
          <option value="CuSMo (C)">CuSMo (C)</option>
          <option value="Cy3-maleimide (C)">Cy3-maleimide (C)</option>
          <option value="Cy3b-maleimide (C)">Cy3b-maleimide (C)</option>
          <option value="CyDye-Cy3 (C)">CyDye-Cy3 (C)</option>
          <option value="CyDye-Cy5 (C)">CyDye-Cy5 (C)</option>
          <option value="Cyano (C)">Cyano (C)</option>
          <option value="Cys-&gt;Ala (C)">Cys-&gt;Ala (C)</option>
          <option value="Cys-&gt;Arg (C)">Cys-&gt;Arg (C)</option>
          <option value="Cys-&gt;Asn (C)">Cys-&gt;Asn (C)</option>
          <option value="Cys-&gt;Asp (C)">Cys-&gt;Asp (C)</option>
          <option value="Cys-&gt;Dha (C)">Cys-&gt;Dha (C)</option>
          <option value="Cys-&gt;Gln (C)">Cys-&gt;Gln (C)</option>
          <option value="Cys-&gt;Glu (C)">Cys-&gt;Glu (C)</option>
          <option value="Cys-&gt;Gly (C)">Cys-&gt;Gly (C)</option>
          <option value="Cys-&gt;His (C)">Cys-&gt;His (C)</option>
          <option value="Cys-&gt;Lys (C)">Cys-&gt;Lys (C)</option>
          <option value="Cys-&gt;Met (C)">Cys-&gt;Met (C)</option>
          <option value="Cys-&gt;Oxoalanine (C)">Cys-&gt;Oxoalanine (C)</option>
          <option value="Cys-&gt;Phe (C)">Cys-&gt;Phe (C)</option>
          <option value="Cys-&gt;Pro (C)">Cys-&gt;Pro (C)</option>
          <option value="Cys-&gt;Ser (C)">Cys-&gt;Ser (C)</option>
          <option value="Cys-&gt;Thr (C)">Cys-&gt;Thr (C)</option>
          <option value="Cys-&gt;Trp (C)">Cys-&gt;Trp (C)</option>
          <option value="Cys-&gt;Tyr (C)">Cys-&gt;Tyr (C)</option>
          <option value="Cys-&gt;Val (C)">Cys-&gt;Val (C)</option>
          <option value="Cys-&gt;Xle (C)">Cys-&gt;Xle (C)</option>
          <option value="Cys-&gt;ethylaminoAla (C)">Cys-&gt;ethylaminoAla (C)</option>
          <option value="Cys-&gt;methylaminoAla (C)">Cys-&gt;methylaminoAla (C)</option>
          <option value="Cysteinyl (C)">Cysteinyl (C)</option>
          <option value="Cytopiloyne (C)">Cytopiloyne (C)</option>
          <option value="Cytopiloyne (K)">Cytopiloyne (K)</option>
          <option value="Cytopiloyne (N-term)">Cytopiloyne (N-term)</option>
          <option value="Cytopiloyne (P)">Cytopiloyne (P)</option>
          <option value="Cytopiloyne (R)">Cytopiloyne (R)</option>
          <option value="Cytopiloyne (S)">Cytopiloyne (S)</option>
          <option value="Cytopiloyne (Y)">Cytopiloyne (Y)</option>
          <option value="Cytopiloyne+water (C)">Cytopiloyne+water (C)</option>
          <option value="Cytopiloyne+water (K)">Cytopiloyne+water (K)</option>
          <option value="Cytopiloyne+water (N-term)">Cytopiloyne+water (N-term)</option>
          <option value="Cytopiloyne+water (R)">Cytopiloyne+water (R)</option>
          <option value="Cytopiloyne+water (S)">Cytopiloyne+water (S)</option>
          <option value="Cytopiloyne+water (T)">Cytopiloyne+water (T)</option>
          <option value="Cytopiloyne+water (Y)">Cytopiloyne+water (Y)</option>
          <option value="DAET (S)">DAET (S)</option>
          <option value="DAET (T)">DAET (T)</option>
          <option value="DEDGFLYMVYASQETFG (K)">DEDGFLYMVYASQETFG (K)</option>
          <option value="DFDNB (K)">DFDNB (K)</option>
          <option value="DFDNB (N)">DFDNB (N)</option>
          <option value="DFDNB (Q)">DFDNB (Q)</option>
          <option value="DFDNB (R)">DFDNB (R)</option>
          <option value="DHP (C)">DHP (C)</option>
          <option value="DMPO (C)">DMPO (C)</option>
          <option value="DMPO (H)">DMPO (H)</option>
          <option value="DMPO (Y)">DMPO (Y)</option>
          <option value="DNCB_hapten (C)">DNCB_hapten (C)</option>
          <option value="DNCB_hapten (H)">DNCB_hapten (H)</option>
          <option value="DNCB_hapten (K)">DNCB_hapten (K)</option>
          <option value="DNCB_hapten (Y)">DNCB_hapten (Y)</option>
          <option value="DNPS (C)">DNPS (C)</option>
          <option value="DNPS (W)">DNPS (W)</option>
          <option value="DTBP (K)">DTBP (K)</option>
          <option value="DTBP (N)">DTBP (N)</option>
          <option value="DTBP (Q)">DTBP (Q)</option>
          <option value="DTBP (R)">DTBP (R)</option>
          <option value="DTT_C (C)">DTT_C (C)</option>
          <option value="DTT_C:2H(6) (C)">DTT_C:2H(6) (C)</option>
          <option value="DTT_ST (S)">DTT_ST (S)</option>
          <option value="DTT_ST (T)">DTT_ST (T)</option>
          <option value="DTT_ST:2H(6) (S)">DTT_ST:2H(6) (S)</option>
          <option value="DTT_ST:2H(6) (T)">DTT_ST:2H(6) (T)</option>
          <option value="Dansyl (K)">Dansyl (K)</option>
          <option value="Dansyl (N-term)">Dansyl (N-term)</option>
          <option value="Dap-DSP (A)">Dap-DSP (A)</option>
          <option value="Dap-DSP (E)">Dap-DSP (E)</option>
          <option value="Dap-DSP (K)">Dap-DSP (K)</option>
          <option value="DeStreak (C)">DeStreak (C)</option>
          <option value="Deamidated (N)">Deamidated (N)</option>
          <option value="Deamidated (Q)">Deamidated (Q)</option>
          <option value="Deamidated (R)">Deamidated (R)</option>
          <option value="Deamidated:18O(1) (N)">Deamidated:18O(1) (N)</option>
          <option value="Deamidated:18O(1) (Q)">Deamidated:18O(1) (Q)</option>
          <option value="Decanoyl (S)">Decanoyl (S)</option>
          <option value="Decanoyl (T)">Decanoyl (T)</option>
          <option value="Dehydrated (D)">Dehydrated (D)</option>
          <option value="Dehydrated (N-term C)">Dehydrated (N-term C)</option>
          <option value="Dehydrated (S)">Dehydrated (S)</option>
          <option value="Dehydrated (T)">Dehydrated (T)</option>
          <option value="Dehydrated (Y)">Dehydrated (Y)</option>
          <option value="Dehydro (C)">Dehydro (C)</option>
          <option value="Delta:H(1)N(-1)18O(1) (N)">Delta:H(1)N(-1)18O(1) (N)</option>
          <option value="Delta:H(2)C(2) (H)">Delta:H(2)C(2) (H)</option>
          <option value="Delta:H(2)C(2) (K)">Delta:H(2)C(2) (K)</option>
          <option value="Delta:H(2)C(2) (N-term)">Delta:H(2)C(2) (N-term)</option>
          <option value="Delta:H(2)C(3) (K)">Delta:H(2)C(3) (K)</option>
          <option value="Delta:H(2)C(3)O(1) (K)">Delta:H(2)C(3)O(1) (K)</option>
          <option value="Delta:H(2)C(3)O(1) (R)">Delta:H(2)C(3)O(1) (R)</option>
          <option value="Delta:H(2)C(5) (K)">Delta:H(2)C(5) (K)</option>
          <option value="Delta:H(4)C(2) (H)">Delta:H(4)C(2) (H)</option>
          <option value="Delta:H(4)C(2) (K)">Delta:H(4)C(2) (K)</option>
          <option value="Delta:H(4)C(2) (N-term)">Delta:H(4)C(2) (N-term)</option>
          <option value="Delta:H(4)C(2)O(-1)S(1) (S)">Delta:H(4)C(2)O(-1)S(1) (S)</option>
          <option value="Delta:H(4)C(3) (H)">Delta:H(4)C(3) (H)</option>
          <option value="Delta:H(4)C(3) (K)">Delta:H(4)C(3) (K)</option>
          <option value="Delta:H(4)C(3)O(1) (C)">Delta:H(4)C(3)O(1) (C)</option>
          <option value="Delta:H(4)C(3)O(1) (H)">Delta:H(4)C(3)O(1) (H)</option>
          <option value="Delta:H(4)C(3)O(1) (K)">Delta:H(4)C(3)O(1) (K)</option>
          <option value="Delta:H(4)C(6) (K)">Delta:H(4)C(6) (K)</option>
          <option value="Delta:H(5)C(2) (P)">Delta:H(5)C(2) (P)</option>
          <option value="Delta:H(6)C(3)O(1) (C)">Delta:H(6)C(3)O(1) (C)</option>
          <option value="Delta:H(6)C(3)O(1) (H)">Delta:H(6)C(3)O(1) (H)</option>
          <option value="Delta:H(6)C(3)O(1) (K)">Delta:H(6)C(3)O(1) (K)</option>
          <option value="Delta:H(6)C(6)O(1) (K)">Delta:H(6)C(6)O(1) (K)</option>
          <option value="Delta:H(8)C(6)O(1) (L)">Delta:H(8)C(6)O(1) (L)</option>
          <option value="Delta:H(8)C(6)O(2) (K)">Delta:H(8)C(6)O(2) (K)</option>
          <option value="Delta:Hg(1) (C)">Delta:Hg(1) (C)</option>
          <option value="Delta:S(-1)Se(1) (C)">Delta:S(-1)Se(1) (C)</option>
          <option value="Delta:S(-1)Se(1) (M)">Delta:S(-1)Se(1) (M)</option>
          <option value="Delta:Se(1) (C)">Delta:Se(1) (C)</option>
          <option value="Deoxy (D)">Deoxy (D)</option>
          <option value="Deoxy (S)">Deoxy (S)</option>
          <option value="Deoxy (T)">Deoxy (T)</option>
          <option value="Deoxyhypusine (K)">Deoxyhypusine (K)</option>
          <option value="Dethiomethyl (M)">Dethiomethyl (M)</option>
          <option value="DiART6plex (K)">DiART6plex (K)</option>
          <option value="DiART6plex (N-term)">DiART6plex (N-term)</option>
          <option value="DiART6plex (Y)">DiART6plex (Y)</option>
          <option value="DiART6plex115 (K)">DiART6plex115 (K)</option>
          <option value="DiART6plex115 (N-term)">DiART6plex115 (N-term)</option>
          <option value="DiART6plex115 (Y)">DiART6plex115 (Y)</option>
          <option value="DiART6plex116/119 (K)">DiART6plex116/119 (K)</option>
          <option value="DiART6plex116/119 (N-term)">DiART6plex116/119 (N-term)</option>
          <option value="DiART6plex116/119 (Y)">DiART6plex116/119 (Y)</option>
          <option value="DiART6plex117 (K)">DiART6plex117 (K)</option>
          <option value="DiART6plex117 (N-term)">DiART6plex117 (N-term)</option>
          <option value="DiART6plex117 (Y)">DiART6plex117 (Y)</option>
          <option value="DiART6plex118 (K)">DiART6plex118 (K)</option>
          <option value="DiART6plex118 (N-term)">DiART6plex118 (N-term)</option>
          <option value="DiART6plex118 (Y)">DiART6plex118 (Y)</option>
          <option value="DiLeu4plex (K)">DiLeu4plex (K)</option>
          <option value="DiLeu4plex (N-term)">DiLeu4plex (N-term)</option>
          <option value="DiLeu4plex (Y)">DiLeu4plex (Y)</option>
          <option value="DiLeu4plex115 (K)">DiLeu4plex115 (K)</option>
          <option value="DiLeu4plex115 (N-term)">DiLeu4plex115 (N-term)</option>
          <option value="DiLeu4plex115 (Y)">DiLeu4plex115 (Y)</option>
          <option value="DiLeu4plex117 (K)">DiLeu4plex117 (K)</option>
          <option value="DiLeu4plex117 (N-term)">DiLeu4plex117 (N-term)</option>
          <option value="DiLeu4plex117 (Y)">DiLeu4plex117 (Y)</option>
          <option value="DiLeu4plex118 (K)">DiLeu4plex118 (K)</option>
          <option value="DiLeu4plex118 (N-term)">DiLeu4plex118 (N-term)</option>
          <option value="DiLeu4plex118 (Y)">DiLeu4plex118 (Y)</option>
          <option value="Diacylglycerol (C)">Diacylglycerol (C)</option>
          <option value="Dibromo (Y)">Dibromo (Y)</option>
          <option value="Dicarbamidomethyl (C)">Dicarbamidomethyl (C)</option>
          <option value="Dicarbamidomethyl (H)">Dicarbamidomethyl (H)</option>
          <option value="Dicarbamidomethyl (K)">Dicarbamidomethyl (K)</option>
          <option value="Dicarbamidomethyl (N-term)">Dicarbamidomethyl (N-term)</option>
          <option value="Dicarbamidomethyl (R)">Dicarbamidomethyl (R)</option>
          <option value="Didehydro (C-term K)">Didehydro (C-term K)</option>
          <option value="Didehydro (S)">Didehydro (S)</option>
          <option value="Didehydro (T)">Didehydro (T)</option>
          <option value="Didehydro (Y)">Didehydro (Y)</option>
          <option value="Didehydroretinylidene (K)">Didehydroretinylidene (K)</option>
          <option value="Diethyl (K)">Diethyl (K)</option>
          <option value="Diethyl (N-term)">Diethyl (N-term)</option>
          <option value="Diethylphosphate (C)">Diethylphosphate (C)</option>
          <option value="Diethylphosphate (H)">Diethylphosphate (H)</option>
          <option value="Diethylphosphate (K)">Diethylphosphate (K)</option>
          <option value="Diethylphosphate (N-term)">Diethylphosphate (N-term)</option>
          <option value="Diethylphosphate (S)">Diethylphosphate (S)</option>
          <option value="Diethylphosphate (T)">Diethylphosphate (T)</option>
          <option value="Diethylphosphate (Y)">Diethylphosphate (Y)</option>
          <option value="Difuran (Y)">Difuran (Y)</option>
          <option value="Dihydroxyimidazolidine (R)">Dihydroxyimidazolidine (R)</option>
          <option value="Diiodo (H)">Diiodo (H)</option>
          <option value="Diiodo (Y)">Diiodo (Y)</option>
          <option value="Diironsubcluster (C)">Diironsubcluster (C)</option>
          <option value="Diisopropylphosphate (K)">Diisopropylphosphate (K)</option>
          <option value="Diisopropylphosphate (N-term)">Diisopropylphosphate (N-term)</option>
          <option value="Diisopropylphosphate (S)">Diisopropylphosphate (S)</option>
          <option value="Diisopropylphosphate (T)">Diisopropylphosphate (T)</option>
          <option value="Diisopropylphosphate (Y)">Diisopropylphosphate (Y)</option>
          <option value="Dimethyl (K)">Dimethyl (K)</option>
          <option value="Dimethyl (N)">Dimethyl (N)</option>
          <option value="Dimethyl (N-term)">Dimethyl (N-term)</option>
          <option value="Dimethyl (R)">Dimethyl (R)</option>
          <option value="Dimethyl:2H(4) (K)">Dimethyl:2H(4) (K)</option>
          <option value="Dimethyl:2H(4) (N-term)">Dimethyl:2H(4) (N-term)</option>
          <option value="Dimethyl:2H(4)13C(2) (K)">Dimethyl:2H(4)13C(2) (K)</option>
          <option value="Dimethyl:2H(4)13C(2) (N-term)">Dimethyl:2H(4)13C(2) (N-term)</option>
          <option value="Dimethyl:2H(6) (K)">Dimethyl:2H(6) (K)</option>
          <option value="Dimethyl:2H(6) (N-term)">Dimethyl:2H(6) (N-term)</option>
          <option value="Dimethyl:2H(6) (R)">Dimethyl:2H(6) (R)</option>
          <option value="Dimethyl:2H(6)13C(2) (K)">Dimethyl:2H(6)13C(2) (K)</option>
          <option value="Dimethyl:2H(6)13C(2) (N-term)">Dimethyl:2H(6)13C(2) (N-term)</option>
          <option value="Dimethyl:2H(6)13C(2) (R)">Dimethyl:2H(6)13C(2) (R)</option>
          <option value="DimethylArsino (C)">DimethylArsino (C)</option>
          <option value="DimethylamineGMBS (C)">DimethylamineGMBS (C)</option>
          <option value="DimethylpyrroleAdduct (K)">DimethylpyrroleAdduct (K)</option>
          <option value="Dioxidation (C)">Dioxidation (C)</option>
          <option value="Dioxidation (F)">Dioxidation (F)</option>
          <option value="Dioxidation (K)">Dioxidation (K)</option>
          <option value="Dioxidation (M)">Dioxidation (M)</option>
          <option value="Dioxidation (P)">Dioxidation (P)</option>
          <option value="Dioxidation (R)">Dioxidation (R)</option>
          <option value="Dioxidation (W)">Dioxidation (W)</option>
          <option value="Dioxidation (Y)">Dioxidation (Y)</option>
          <option value="Diphthamide (H)">Diphthamide (H)</option>
          <option value="Dipyridyl (C)">Dipyridyl (C)</option>
          <option value="Dipyrrolylmethanemethyl (C)">Dipyrrolylmethanemethyl (C)</option>
          <option value="DyLight-maleimide (C)">DyLight-maleimide (C)</option>
          <option value="EDEDTIDVFQQQTGG (K)">EDEDTIDVFQQQTGG (K)</option>
          <option value="EDT-iodoacetyl-PEO-biotin (S)">EDT-iodoacetyl-PEO-biotin (S)</option>
          <option value="EDT-iodoacetyl-PEO-biotin (T)">EDT-iodoacetyl-PEO-biotin (T)</option>
          <option value="EDT-maleimide-PEO-biotin (S)">EDT-maleimide-PEO-biotin (S)</option>
          <option value="EDT-maleimide-PEO-biotin (T)">EDT-maleimide-PEO-biotin (T)</option>
          <option value="EEEDVIEVYQEQTGG (K)">EEEDVIEVYQEQTGG (K)</option>
          <option value="EGCG1 (C)">EGCG1 (C)</option>
          <option value="EGCG2 (C)">EGCG2 (C)</option>
          <option value="EHD-diphenylpentanone (C)">EHD-diphenylpentanone (C)</option>
          <option value="EHD-diphenylpentanone (M)">EHD-diphenylpentanone (M)</option>
          <option value="EQAT (C)">EQAT (C)</option>
          <option value="EQAT:2H(5) (C)">EQAT:2H(5) (C)</option>
          <option value="EQIGG (K)">EQIGG (K)</option>
          <option value="ESP (K)">ESP (K)</option>
          <option value="ESP (N-term)">ESP (N-term)</option>
          <option value="ESP:2H(10) (K)">ESP:2H(10) (K)</option>
          <option value="ESP:2H(10) (N-term)">ESP:2H(10) (N-term)</option>
          <option value="Ethanedithiol (S)">Ethanedithiol (S)</option>
          <option value="Ethanedithiol (T)">Ethanedithiol (T)</option>
          <option value="Ethanolamine (C)">Ethanolamine (C)</option>
          <option value="Ethanolamine (C-term)">Ethanolamine (C-term)</option>
          <option value="Ethanolamine (D)">Ethanolamine (D)</option>
          <option value="Ethanolamine (E)">Ethanolamine (E)</option>
          <option value="Ethanolyl (C)">Ethanolyl (C)</option>
          <option value="Ethanolyl (K)">Ethanolyl (K)</option>
          <option value="Ethanolyl (R)">Ethanolyl (R)</option>
          <option value="Ethoxyformyl (H)">Ethoxyformyl (H)</option>
          <option value="Ethyl (C-term)">Ethyl (C-term)</option>
          <option value="Ethyl (D)">Ethyl (D)</option>
          <option value="Ethyl (E)">Ethyl (E)</option>
          <option value="Ethyl (K)">Ethyl (K)</option>
          <option value="Ethyl (N-term)">Ethyl (N-term)</option>
          <option value="Ethyl+Deamidated (N)">Ethyl+Deamidated (N)</option>
          <option value="Ethyl+Deamidated (Q)">Ethyl+Deamidated (Q)</option>
          <option value="Ethylphosphate (K)">Ethylphosphate (K)</option>
          <option value="Ethylphosphate (N-term)">Ethylphosphate (N-term)</option>
          <option value="Ethylphosphate (S)">Ethylphosphate (S)</option>
          <option value="Ethylphosphate (T)">Ethylphosphate (T)</option>
          <option value="Ethylphosphate (Y)">Ethylphosphate (Y)</option>
          <option value="ExacTagAmine (K)">ExacTagAmine (K)</option>
          <option value="ExacTagThiol (C)">ExacTagThiol (C)</option>
          <option value="FAD (C)">FAD (C)</option>
          <option value="FAD (H)">FAD (H)</option>
          <option value="FAD (Y)">FAD (Y)</option>
          <option value="FMN (S)">FMN (S)</option>
          <option value="FMN (T)">FMN (T)</option>
          <option value="FMNC (C)">FMNC (C)</option>
          <option value="FMNH (C)">FMNH (C)</option>
          <option value="FMNH (H)">FMNH (H)</option>
          <option value="FNEM (C)">FNEM (C)</option>
          <option value="FP-Biotin (K)">FP-Biotin (K)</option>
          <option value="FP-Biotin (S)">FP-Biotin (S)</option>
          <option value="FP-Biotin (T)">FP-Biotin (T)</option>
          <option value="FP-Biotin (Y)">FP-Biotin (Y)</option>
          <option value="FTC (C)">FTC (C)</option>
          <option value="FTC (K)">FTC (K)</option>
          <option value="FTC (P)">FTC (P)</option>
          <option value="FTC (R)">FTC (R)</option>
          <option value="FTC (S)">FTC (S)</option>
          <option value="Farnesyl (C)">Farnesyl (C)</option>
          <option value="Fluorescein (C)">Fluorescein (C)</option>
          <option value="Fluoro (A)">Fluoro (A)</option>
          <option value="Fluoro (F)">Fluoro (F)</option>
          <option value="Fluoro (W)">Fluoro (W)</option>
          <option value="Fluoro (Y)">Fluoro (Y)</option>
          <option value="Formyl (K)">Formyl (K)</option>
          <option value="Formyl (N-term)">Formyl (N-term)</option>
          <option value="Formyl (S)">Formyl (S)</option>
          <option value="Formyl (T)">Formyl (T)</option>
          <option value="Furan (Y)">Furan (Y)</option>
          <option value="G-H1 (R)">G-H1 (R)</option>
          <option value="GG (C)">GG (C)</option>
          <option value="GG (K)">GG (K)</option>
          <option value="GG (S)">GG (S)</option>
          <option value="GG (T)">GG (T)</option>
          <option value="GGQ (K)">GGQ (K)</option>
          <option value="GIST-Quat (K)">GIST-Quat (K)</option>
          <option value="GIST-Quat (N-term)">GIST-Quat (N-term)</option>
          <option value="GIST-Quat:2H(3) (K)">GIST-Quat:2H(3) (K)</option>
          <option value="GIST-Quat:2H(3) (N-term)">GIST-Quat:2H(3) (N-term)</option>
          <option value="GIST-Quat:2H(6) (K)">GIST-Quat:2H(6) (K)</option>
          <option value="GIST-Quat:2H(6) (N-term)">GIST-Quat:2H(6) (N-term)</option>
          <option value="GIST-Quat:2H(9) (K)">GIST-Quat:2H(9) (K)</option>
          <option value="GIST-Quat:2H(9) (N-term)">GIST-Quat:2H(9) (N-term)</option>
          <option value="Galactosyl (K)">Galactosyl (K)</option>
          <option value="GeranylGeranyl (C)">GeranylGeranyl (C)</option>
          <option value="Gln-&gt;Ala (Q)">Gln-&gt;Ala (Q)</option>
          <option value="Gln-&gt;Arg (Q)">Gln-&gt;Arg (Q)</option>
          <option value="Gln-&gt;Asn (Q)">Gln-&gt;Asn (Q)</option>
          <option value="Gln-&gt;Asp (Q)">Gln-&gt;Asp (Q)</option>
          <option value="Gln-&gt;Cys (Q)">Gln-&gt;Cys (Q)</option>
          <option value="Gln-&gt;Glu (Q)">Gln-&gt;Glu (Q)</option>
          <option value="Gln-&gt;Gly (Q)">Gln-&gt;Gly (Q)</option>
          <option value="Gln-&gt;His (Q)">Gln-&gt;His (Q)</option>
          <option value="Gln-&gt;Lys (Q)">Gln-&gt;Lys (Q)</option>
          <option value="Gln-&gt;Met (Q)">Gln-&gt;Met (Q)</option>
          <option value="Gln-&gt;Phe (Q)">Gln-&gt;Phe (Q)</option>
          <option value="Gln-&gt;Pro (Q)">Gln-&gt;Pro (Q)</option>
          <option value="Gln-&gt;Ser (Q)">Gln-&gt;Ser (Q)</option>
          <option value="Gln-&gt;Thr (Q)">Gln-&gt;Thr (Q)</option>
          <option value="Gln-&gt;Trp (Q)">Gln-&gt;Trp (Q)</option>
          <option value="Gln-&gt;Tyr (Q)">Gln-&gt;Tyr (Q)</option>
          <option value="Gln-&gt;Val (Q)">Gln-&gt;Val (Q)</option>
          <option value="Gln-&gt;Xle (Q)">Gln-&gt;Xle (Q)</option>
          <option value="Gln-&gt;pyro-Glu (N-term Q)">Gln-&gt;pyro-Glu (N-term Q)</option>
          <option value="Glu (E)">Glu (E)</option>
          <option value="Glu-&gt;Ala (E)">Glu-&gt;Ala (E)</option>
          <option value="Glu-&gt;Arg (E)">Glu-&gt;Arg (E)</option>
          <option value="Glu-&gt;Asn (E)">Glu-&gt;Asn (E)</option>
          <option value="Glu-&gt;Asp (E)">Glu-&gt;Asp (E)</option>
          <option value="Glu-&gt;Cys (E)">Glu-&gt;Cys (E)</option>
          <option value="Glu-&gt;Gln (E)">Glu-&gt;Gln (E)</option>
          <option value="Glu-&gt;Gly (E)">Glu-&gt;Gly (E)</option>
          <option value="Glu-&gt;His (E)">Glu-&gt;His (E)</option>
          <option value="Glu-&gt;Lys (E)">Glu-&gt;Lys (E)</option>
          <option value="Glu-&gt;Met (E)">Glu-&gt;Met (E)</option>
          <option value="Glu-&gt;Phe (E)">Glu-&gt;Phe (E)</option>
          <option value="Glu-&gt;Pro (E)">Glu-&gt;Pro (E)</option>
          <option value="Glu-&gt;Ser (E)">Glu-&gt;Ser (E)</option>
          <option value="Glu-&gt;Thr (E)">Glu-&gt;Thr (E)</option>
          <option value="Glu-&gt;Trp (E)">Glu-&gt;Trp (E)</option>
          <option value="Glu-&gt;Tyr (E)">Glu-&gt;Tyr (E)</option>
          <option value="Glu-&gt;Val (E)">Glu-&gt;Val (E)</option>
          <option value="Glu-&gt;Xle (E)">Glu-&gt;Xle (E)</option>
          <option value="Glu-&gt;pyro-Glu (N-term E)">Glu-&gt;pyro-Glu (N-term E)</option>
          <option value="GluGlu (E)">GluGlu (E)</option>
          <option value="GluGluGlu (E)">GluGluGlu (E)</option>
          <option value="GluGluGluGlu (E)">GluGluGluGlu (E)</option>
          <option value="Gluconoylation (K)">Gluconoylation (K)</option>
          <option value="Gluconoylation (N-term)">Gluconoylation (N-term)</option>
          <option value="Glucosylgalactosyl (K)">Glucosylgalactosyl (K)</option>
          <option value="Glucuronyl (S)">Glucuronyl (S)</option>
          <option value="Glutathione (C)">Glutathione (C)</option>
          <option value="Gly (K)">Gly (K)</option>
          <option value="Gly (S)">Gly (S)</option>
          <option value="Gly (T)">Gly (T)</option>
          <option value="Gly-&gt;Ala (G)">Gly-&gt;Ala (G)</option>
          <option value="Gly-&gt;Arg (G)">Gly-&gt;Arg (G)</option>
          <option value="Gly-&gt;Asn (G)">Gly-&gt;Asn (G)</option>
          <option value="Gly-&gt;Asp (G)">Gly-&gt;Asp (G)</option>
          <option value="Gly-&gt;Cys (G)">Gly-&gt;Cys (G)</option>
          <option value="Gly-&gt;Gln (G)">Gly-&gt;Gln (G)</option>
          <option value="Gly-&gt;Glu (G)">Gly-&gt;Glu (G)</option>
          <option value="Gly-&gt;His (G)">Gly-&gt;His (G)</option>
          <option value="Gly-&gt;Lys (G)">Gly-&gt;Lys (G)</option>
          <option value="Gly-&gt;Met (G)">Gly-&gt;Met (G)</option>
          <option value="Gly-&gt;Phe (G)">Gly-&gt;Phe (G)</option>
          <option value="Gly-&gt;Pro (G)">Gly-&gt;Pro (G)</option>
          <option value="Gly-&gt;Ser (G)">Gly-&gt;Ser (G)</option>
          <option value="Gly-&gt;Thr (G)">Gly-&gt;Thr (G)</option>
          <option value="Gly-&gt;Trp (G)">Gly-&gt;Trp (G)</option>
          <option value="Gly-&gt;Tyr (G)">Gly-&gt;Tyr (G)</option>
          <option value="Gly-&gt;Val (G)">Gly-&gt;Val (G)</option>
          <option value="Gly-&gt;Xle (G)">Gly-&gt;Xle (G)</option>
          <option value="Gly-loss+Amide (C-term G)">Gly-loss+Amide (C-term G)</option>
          <option value="Glycerophospho (S)">Glycerophospho (S)</option>
          <option value="GlycerylPE (E)">GlycerylPE (E)</option>
          <option value="Glycosyl (P)">Glycosyl (P)</option>
          <option value="Guanidinyl (K)">Guanidinyl (K)</option>
          <option value="Guanidinyl (N-term)">Guanidinyl (N-term)</option>
          <option value="HCysThiolactone (K)">HCysThiolactone (K)</option>
          <option value="HCysteinyl (C)">HCysteinyl (C)</option>
          <option value="HMVK (C)">HMVK (C)</option>
          <option value="HN2_mustard (C)">HN2_mustard (C)</option>
          <option value="HN2_mustard (H)">HN2_mustard (H)</option>
          <option value="HN2_mustard (K)">HN2_mustard (K)</option>
          <option value="HN3_mustard (C)">HN3_mustard (C)</option>
          <option value="HN3_mustard (H)">HN3_mustard (H)</option>
          <option value="HN3_mustard (K)">HN3_mustard (K)</option>
          <option value="HNE (A)">HNE (A)</option>
          <option value="HNE (C)">HNE (C)</option>
          <option value="HNE (H)">HNE (H)</option>
          <option value="HNE (K)">HNE (K)</option>
          <option value="HNE (L)">HNE (L)</option>
          <option value="HNE+Delta:H(2) (C)">HNE+Delta:H(2) (C)</option>
          <option value="HNE+Delta:H(2) (H)">HNE+Delta:H(2) (H)</option>
          <option value="HNE+Delta:H(2) (K)">HNE+Delta:H(2) (K)</option>
          <option value="HNE-BAHAH (C)">HNE-BAHAH (C)</option>
          <option value="HNE-BAHAH (H)">HNE-BAHAH (H)</option>
          <option value="HNE-BAHAH (K)">HNE-BAHAH (K)</option>
          <option value="HNE-Delta:H(2)O (C)">HNE-Delta:H(2)O (C)</option>
          <option value="HNE-Delta:H(2)O (H)">HNE-Delta:H(2)O (H)</option>
          <option value="HNE-Delta:H(2)O (K)">HNE-Delta:H(2)O (K)</option>
          <option value="HPG (R)">HPG (R)</option>
          <option value="Heme (C)">Heme (C)</option>
          <option value="Heme (H)">Heme (H)</option>
          <option value="Hep (K)">Hep (K)</option>
          <option value="Hep (N)">Hep (N)</option>
          <option value="Hep (Q)">Hep (Q)</option>
          <option value="Hep (R)">Hep (R)</option>
          <option value="Hep (S)">Hep (S)</option>
          <option value="Hep (T)">Hep (T)</option>
          <option value="Hex (C)">Hex (C)</option>
          <option value="Hex (K)">Hex (K)</option>
          <option value="Hex (N)">Hex (N)</option>
          <option value="Hex (N-term)">Hex (N-term)</option>
          <option value="Hex (R)">Hex (R)</option>
          <option value="Hex (S)">Hex (S)</option>
          <option value="Hex (T)">Hex (T)</option>
          <option value="Hex (W)">Hex (W)</option>
          <option value="Hex (Y)">Hex (Y)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(1) (N)">Hex(1)HexNAc(1)NeuAc(1) (N)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(1) (S)">Hex(1)HexNAc(1)NeuAc(1) (S)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(1) (T)">Hex(1)HexNAc(1)NeuAc(1) (T)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(2) (N)">Hex(1)HexNAc(1)NeuAc(2) (N)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(2) (S)">Hex(1)HexNAc(1)NeuAc(2) (S)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(2) (T)">Hex(1)HexNAc(1)NeuAc(2) (T)</option>
          <option value="Hex(1)HexNAc(1)dHex(1) (N)">Hex(1)HexNAc(1)dHex(1) (N)</option>
          <option value="Hex(1)HexNAc(2) (N)">Hex(1)HexNAc(2) (N)</option>
          <option value="Hex(1)HexNAc(2)Pent(1) (N)">Hex(1)HexNAc(2)Pent(1) (N)</option>
          <option value="Hex(1)HexNAc(2)dHex(1) (N)">Hex(1)HexNAc(2)dHex(1) (N)</option>
          <option value="Hex(1)HexNAc(2)dHex(1)Pent(1) (N)">Hex(1)HexNAc(2)dHex(1)Pent(1) (N)</option>
          <option value="Hex(1)HexNAc(2)dHex(2) (N)">Hex(1)HexNAc(2)dHex(2) (N)</option>
          <option value="Hex(2) (K)">Hex(2) (K)</option>
          <option value="Hex(2) (R)">Hex(2) (R)</option>
          <option value="Hex(2)HexNAc(2) (N)">Hex(2)HexNAc(2) (N)</option>
          <option value="Hex(2)HexNAc(2)Pent(1) (N)">Hex(2)HexNAc(2)Pent(1) (N)</option>
          <option value="Hex(2)HexNAc(2)dHex(1) (N)">Hex(2)HexNAc(2)dHex(1) (N)</option>
          <option value="Hex(3) (N)">Hex(3) (N)</option>
          <option value="Hex(3)HexNAc(1)Pent(1) (N)">Hex(3)HexNAc(1)Pent(1) (N)</option>
          <option value="Hex(3)HexNAc(2) (N)">Hex(3)HexNAc(2) (N)</option>
          <option value="Hex(3)HexNAc(2)P(1) (N)">Hex(3)HexNAc(2)P(1) (N)</option>
          <option value="Hex(3)HexNAc(4) (N)">Hex(3)HexNAc(4) (N)</option>
          <option value="Hex(4)HexNAc(4) (N)">Hex(4)HexNAc(4) (N)</option>
          <option value="Hex(5)HexNAc(2) (N)">Hex(5)HexNAc(2) (N)</option>
          <option value="Hex(5)HexNAc(4) (N)">Hex(5)HexNAc(4) (N)</option>
          <option value="Hex(5)HexNAc(4)NeuAc(1) (N)">Hex(5)HexNAc(4)NeuAc(1) (N)</option>
          <option value="Hex(5)HexNAc(4)NeuAc(2) (N)">Hex(5)HexNAc(4)NeuAc(2) (N)</option>
          <option value="Hex1HexNAc1 (N)">Hex1HexNAc1 (N)</option>
          <option value="Hex1HexNAc1 (S)">Hex1HexNAc1 (S)</option>
          <option value="Hex1HexNAc1 (T)">Hex1HexNAc1 (T)</option>
          <option value="HexN (K)">HexN (K)</option>
          <option value="HexN (N)">HexN (N)</option>
          <option value="HexN (T)">HexN (T)</option>
          <option value="HexN (W)">HexN (W)</option>
          <option value="HexNAc (N)">HexNAc (N)</option>
          <option value="HexNAc (S)">HexNAc (S)</option>
          <option value="HexNAc (T)">HexNAc (T)</option>
          <option value="HexNAc(1)dHex(1) (N)">HexNAc(1)dHex(1) (N)</option>
          <option value="HexNAc(1)dHex(2) (N)">HexNAc(1)dHex(2) (N)</option>
          <option value="HexNAc(2) (N)">HexNAc(2) (N)</option>
          <option value="HexNAc(2)dHex(1) (N)">HexNAc(2)dHex(1) (N)</option>
          <option value="HexNAc(2)dHex(2) (N)">HexNAc(2)dHex(2) (N)</option>
          <option value="His-&gt;Ala (H)">His-&gt;Ala (H)</option>
          <option value="His-&gt;Arg (H)">His-&gt;Arg (H)</option>
          <option value="His-&gt;Asn (H)">His-&gt;Asn (H)</option>
          <option value="His-&gt;Asp (H)">His-&gt;Asp (H)</option>
          <option value="His-&gt;Cys (H)">His-&gt;Cys (H)</option>
          <option value="His-&gt;Gln (H)">His-&gt;Gln (H)</option>
          <option value="His-&gt;Glu (H)">His-&gt;Glu (H)</option>
          <option value="His-&gt;Gly (H)">His-&gt;Gly (H)</option>
          <option value="His-&gt;Lys (H)">His-&gt;Lys (H)</option>
          <option value="His-&gt;Met (H)">His-&gt;Met (H)</option>
          <option value="His-&gt;Phe (H)">His-&gt;Phe (H)</option>
          <option value="His-&gt;Pro (H)">His-&gt;Pro (H)</option>
          <option value="His-&gt;Ser (H)">His-&gt;Ser (H)</option>
          <option value="His-&gt;Thr (H)">His-&gt;Thr (H)</option>
          <option value="His-&gt;Trp (H)">His-&gt;Trp (H)</option>
          <option value="His-&gt;Tyr (H)">His-&gt;Tyr (H)</option>
          <option value="His-&gt;Val (H)">His-&gt;Val (H)</option>
          <option value="His-&gt;Xle (H)">His-&gt;Xle (H)</option>
          <option value="Homocysteic_acid (M)">Homocysteic_acid (M)</option>
          <option value="Hydroxamic_acid (D)">Hydroxamic_acid (D)</option>
          <option value="Hydroxamic_acid (E)">Hydroxamic_acid (E)</option>
          <option value="Hydroxycinnamyl (C)">Hydroxycinnamyl (C)</option>
          <option value="Hydroxyfarnesyl (C)">Hydroxyfarnesyl (C)</option>
          <option value="Hydroxyheme (E)">Hydroxyheme (E)</option>
          <option value="Hydroxymethyl (N)">Hydroxymethyl (N)</option>
          <option value="HydroxymethylOP (K)">HydroxymethylOP (K)</option>
          <option value="Hydroxytrimethyl (K)">Hydroxytrimethyl (K)</option>
          <option value="Hypusine (K)">Hypusine (K)</option>
          <option value="IBTP (C)">IBTP (C)</option>
          <option value="ICAT-C (C)">ICAT-C (C)</option>
          <option value="ICAT-C:13C(9) (C)">ICAT-C:13C(9) (C)</option>
          <option value="ICAT-D (C)">ICAT-D (C)</option>
          <option value="ICAT-D:2H(8) (C)">ICAT-D:2H(8) (C)</option>
          <option value="ICAT-G (C)">ICAT-G (C)</option>
          <option value="ICAT-G:2H(8) (C)">ICAT-G:2H(8) (C)</option>
          <option value="ICAT-H (C)">ICAT-H (C)</option>
          <option value="ICAT-H:13C(6) (C)">ICAT-H:13C(6) (C)</option>
          <option value="ICDID (C)">ICDID (C)</option>
          <option value="ICDID:2H(6) (C)">ICDID:2H(6) (C)</option>
          <option value="ICPL (K)">ICPL (K)</option>
          <option value="ICPL (N-term)">ICPL (N-term)</option>
          <option value="ICPL:13C(6) (K)">ICPL:13C(6) (K)</option>
          <option value="ICPL:13C(6) (N-term)">ICPL:13C(6) (N-term)</option>
          <option value="ICPL:13C(6)2H(4) (K)">ICPL:13C(6)2H(4) (K)</option>
          <option value="ICPL:13C(6)2H(4) (N-term)">ICPL:13C(6)2H(4) (N-term)</option>
          <option value="ICPL:2H(4) (K)">ICPL:2H(4) (K)</option>
          <option value="ICPL:2H(4) (N-term)">ICPL:2H(4) (N-term)</option>
          <option value="IDEnT (C)">IDEnT (C)</option>
          <option value="IED-Biotin (C)">IED-Biotin (C)</option>
          <option value="IGBP (C)">IGBP (C)</option>
          <option value="IGBP:13C(2) (C)">IGBP:13C(2) (C)</option>
          <option value="IMEHex(2)NeuAc(1) (K)">IMEHex(2)NeuAc(1) (K)</option>
          <option value="IMID (K)">IMID (K)</option>
          <option value="IMID:2H(4) (K)">IMID:2H(4) (K)</option>
          <option value="ISD_z+2_ion (N-term)">ISD_z+2_ion (N-term)</option>
          <option value="Iminobiotin (K)">Iminobiotin (K)</option>
          <option value="Iminobiotin (N-term)">Iminobiotin (N-term)</option>
          <option value="Iodo (H)">Iodo (H)</option>
          <option value="Iodo (Y)">Iodo (Y)</option>
          <option value="IodoU-AMP (F)">IodoU-AMP (F)</option>
          <option value="IodoU-AMP (W)">IodoU-AMP (W)</option>
          <option value="IodoU-AMP (Y)">IodoU-AMP (Y)</option>
          <option value="Iodoacetanilide (C)">Iodoacetanilide (C)</option>
          <option value="Iodoacetanilide (K)">Iodoacetanilide (K)</option>
          <option value="Iodoacetanilide (N-term)">Iodoacetanilide (N-term)</option>
          <option value="Iodoacetanilide:13C(6) (C)">Iodoacetanilide:13C(6) (C)</option>
          <option value="Iodoacetanilide:13C(6) (K)">Iodoacetanilide:13C(6) (K)</option>
          <option value="Iodoacetanilide:13C(6) (N-term)">Iodoacetanilide:13C(6) (N-term)</option>
          <option value="Isopropylphospho (S)">Isopropylphospho (S)</option>
          <option value="Isopropylphospho (T)">Isopropylphospho (T)</option>
          <option value="Isopropylphospho (Y)">Isopropylphospho (Y)</option>
          <option value="LG-Hlactam-K (K)">LG-Hlactam-K (K)</option>
          <option value="LG-Hlactam-R (R)">LG-Hlactam-R (R)</option>
          <option value="LG-anhydrolactam (K)">LG-anhydrolactam (K)</option>
          <option value="LG-anhydrolactam (N-term)">LG-anhydrolactam (N-term)</option>
          <option value="LG-anhyropyrrole (K)">LG-anhyropyrrole (K)</option>
          <option value="LG-anhyropyrrole (N-term)">LG-anhyropyrrole (N-term)</option>
          <option value="LG-lactam-K (K)">LG-lactam-K (K)</option>
          <option value="LG-lactam-R (R)">LG-lactam-R (R)</option>
          <option value="LG-pyrrole (K)">LG-pyrrole (K)</option>
          <option value="LG-pyrrole (N-term)">LG-pyrrole (N-term)</option>
          <option value="LRGG (K)">LRGG (K)</option>
          <option value="Label:13C(1)2H(3) (M)">Label:13C(1)2H(3) (M)</option>
          <option value="Label:13C(1)2H(3)+Oxidation (M)">Label:13C(1)2H(3)+Oxidation (M)</option>
          <option value="Label:13C(3) (A)">Label:13C(3) (A)</option>
          <option value="Label:13C(3)15N(1) (A)">Label:13C(3)15N(1) (A)</option>
          <option value="Label:13C(4) (M)">Label:13C(4) (M)</option>
          <option value="Label:13C(4)+Oxidation (M)">Label:13C(4)+Oxidation (M)</option>
          <option value="Label:13C(4)15N(1) (D)">Label:13C(4)15N(1) (D)</option>
          <option value="Label:13C(4)15N(2)+GG (K)">Label:13C(4)15N(2)+GG (K)</option>
          <option value="Label:13C(5) (P)">Label:13C(5) (P)</option>
          <option value="Label:13C(5)15N(1) (E)">Label:13C(5)15N(1) (E)</option>
          <option value="Label:13C(5)15N(1) (M)">Label:13C(5)15N(1) (M)</option>
          <option value="Label:13C(5)15N(1) (P)">Label:13C(5)15N(1) (P)</option>
          <option value="Label:13C(5)15N(1) (V)">Label:13C(5)15N(1) (V)</option>
          <option value="Label:13C(6) (I)">Label:13C(6) (I)</option>
          <option value="Label:13C(6) (K)">Label:13C(6) (K)</option>
          <option value="Label:13C(6) (L)">Label:13C(6) (L)</option>
          <option value="Label:13C(6) (R)">Label:13C(6) (R)</option>
          <option value="Label:13C(6)+Acetyl (K)">Label:13C(6)+Acetyl (K)</option>
          <option value="Label:13C(6)+Dimethyl (K)">Label:13C(6)+Dimethyl (K)</option>
          <option value="Label:13C(6)+GG (K)">Label:13C(6)+GG (K)</option>
          <option value="Label:13C(6)15N(1) (I)">Label:13C(6)15N(1) (I)</option>
          <option value="Label:13C(6)15N(1) (L)">Label:13C(6)15N(1) (L)</option>
          <option value="Label:13C(6)15N(2) (K)">Label:13C(6)15N(2) (K)</option>
          <option value="Label:13C(6)15N(2)+Acetyl (K)">Label:13C(6)15N(2)+Acetyl (K)</option>
          <option value="Label:13C(6)15N(2)+Dimethyl (K)">Label:13C(6)15N(2)+Dimethyl (K)</option>
          <option value="Label:13C(6)15N(2)+GG (K)">Label:13C(6)15N(2)+GG (K)</option>
          <option value="Label:13C(6)15N(4) (R)">Label:13C(6)15N(4) (R)</option>
          <option value="Label:13C(6)15N(4)+Dimethyl (R)">Label:13C(6)15N(4)+Dimethyl (R)</option>
          <option value="Label:13C(6)15N(4)+Dimethyl:2H(6)13C(2) (R)">Label:13C(6)15N(4)+Dimethyl:2H(6)13C(2) (R)</option>
          <option value="Label:13C(6)15N(4)+Methyl (R)">Label:13C(6)15N(4)+Methyl (R)</option>
          <option value="Label:13C(6)15N(4)+Methyl:2H(3)13C(1) (R)">Label:13C(6)15N(4)+Methyl:2H(3)13C(1) (R)</option>
          <option value="Label:13C(8)15N(2) (R)">Label:13C(8)15N(2) (R)</option>
          <option value="Label:13C(9) (F)">Label:13C(9) (F)</option>
          <option value="Label:13C(9) (Y)">Label:13C(9) (Y)</option>
          <option value="Label:13C(9)+Phospho (Y)">Label:13C(9)+Phospho (Y)</option>
          <option value="Label:13C(9)15N(1) (F)">Label:13C(9)15N(1) (F)</option>
          <option value="Label:15N(1) (A)">Label:15N(1) (A)</option>
          <option value="Label:15N(1) (C)">Label:15N(1) (C)</option>
          <option value="Label:15N(1) (D)">Label:15N(1) (D)</option>
          <option value="Label:15N(1) (E)">Label:15N(1) (E)</option>
          <option value="Label:15N(1) (F)">Label:15N(1) (F)</option>
          <option value="Label:15N(1) (G)">Label:15N(1) (G)</option>
          <option value="Label:15N(1) (I)">Label:15N(1) (I)</option>
          <option value="Label:15N(1) (L)">Label:15N(1) (L)</option>
          <option value="Label:15N(1) (M)">Label:15N(1) (M)</option>
          <option value="Label:15N(1) (P)">Label:15N(1) (P)</option>
          <option value="Label:15N(1) (S)">Label:15N(1) (S)</option>
          <option value="Label:15N(1) (T)">Label:15N(1) (T)</option>
          <option value="Label:15N(1) (V)">Label:15N(1) (V)</option>
          <option value="Label:15N(1) (Y)">Label:15N(1) (Y)</option>
          <option value="Label:15N(2) (K)">Label:15N(2) (K)</option>
          <option value="Label:15N(2) (N)">Label:15N(2) (N)</option>
          <option value="Label:15N(2) (Q)">Label:15N(2) (Q)</option>
          <option value="Label:15N(2) (W)">Label:15N(2) (W)</option>
          <option value="Label:15N(2)2H(9) (K)">Label:15N(2)2H(9) (K)</option>
          <option value="Label:15N(3) (H)">Label:15N(3) (H)</option>
          <option value="Label:15N(4) (R)">Label:15N(4) (R)</option>
          <option value="Label:18O(1) (C-term)">Label:18O(1) (C-term)</option>
          <option value="Label:18O(1) (S)">Label:18O(1) (S)</option>
          <option value="Label:18O(1) (T)">Label:18O(1) (T)</option>
          <option value="Label:18O(1) (Y)">Label:18O(1) (Y)</option>
          <option value="Label:18O(2) (C-term)">Label:18O(2) (C-term)</option>
          <option value="Label:2H(10) (L)">Label:2H(10) (L)</option>
          <option value="Label:2H(3) (L)">Label:2H(3) (L)</option>
          <option value="Label:2H(3) (M)">Label:2H(3) (M)</option>
          <option value="Label:2H(3)+Oxidation (M)">Label:2H(3)+Oxidation (M)</option>
          <option value="Label:2H(4) (F)">Label:2H(4) (F)</option>
          <option value="Label:2H(4) (K)">Label:2H(4) (K)</option>
          <option value="Label:2H(4) (Y)">Label:2H(4) (Y)</option>
          <option value="Label:2H(4)+Acetyl (K)">Label:2H(4)+Acetyl (K)</option>
          <option value="Label:2H(4)+GG (K)">Label:2H(4)+GG (K)</option>
          <option value="Label:2H(4)13C(1) (R)">Label:2H(4)13C(1) (R)</option>
          <option value="Label:2H(6)15N(1) (P)">Label:2H(6)15N(1) (P)</option>
          <option value="Label:2H(7)15N(4) (R)">Label:2H(7)15N(4) (R)</option>
          <option value="Label:2H(9)13C(6)15N(2) (K)">Label:2H(9)13C(6)15N(2) (K)</option>
          <option value="Leu-&gt;MetOx (L)">Leu-&gt;MetOx (L)</option>
          <option value="Lipoyl (K)">Lipoyl (K)</option>
          <option value="Lys (N-term)">Lys (N-term)</option>
          <option value="Lys-&gt;Ala (K)">Lys-&gt;Ala (K)</option>
          <option value="Lys-&gt;Allysine (K)">Lys-&gt;Allysine (K)</option>
          <option value="Lys-&gt;AminoadipicAcid (K)">Lys-&gt;AminoadipicAcid (K)</option>
          <option value="Lys-&gt;Arg (K)">Lys-&gt;Arg (K)</option>
          <option value="Lys-&gt;Asn (K)">Lys-&gt;Asn (K)</option>
          <option value="Lys-&gt;Asp (K)">Lys-&gt;Asp (K)</option>
          <option value="Lys-&gt;CamCys (K)">Lys-&gt;CamCys (K)</option>
          <option value="Lys-&gt;Cys (K)">Lys-&gt;Cys (K)</option>
          <option value="Lys-&gt;Gln (K)">Lys-&gt;Gln (K)</option>
          <option value="Lys-&gt;Glu (K)">Lys-&gt;Glu (K)</option>
          <option value="Lys-&gt;Gly (K)">Lys-&gt;Gly (K)</option>
          <option value="Lys-&gt;His (K)">Lys-&gt;His (K)</option>
          <option value="Lys-&gt;Met (K)">Lys-&gt;Met (K)</option>
          <option value="Lys-&gt;MetOx (K)">Lys-&gt;MetOx (K)</option>
          <option value="Lys-&gt;Phe (K)">Lys-&gt;Phe (K)</option>
          <option value="Lys-&gt;Pro (K)">Lys-&gt;Pro (K)</option>
          <option value="Lys-&gt;Ser (K)">Lys-&gt;Ser (K)</option>
          <option value="Lys-&gt;Thr (K)">Lys-&gt;Thr (K)</option>
          <option value="Lys-&gt;Trp (K)">Lys-&gt;Trp (K)</option>
          <option value="Lys-&gt;Tyr (K)">Lys-&gt;Tyr (K)</option>
          <option value="Lys-&gt;Val (K)">Lys-&gt;Val (K)</option>
          <option value="Lys-&gt;Xle (K)">Lys-&gt;Xle (K)</option>
          <option value="Lysbiotinhydrazide (K)">Lysbiotinhydrazide (K)</option>
          <option value="MDCC (C)">MDCC (C)</option>
          <option value="MG-H1 (R)">MG-H1 (R)</option>
          <option value="MM-diphenylpentanone (C)">MM-diphenylpentanone (C)</option>
          <option value="MTSL (C)">MTSL (C)</option>
          <option value="Maleimide-PEO2-Biotin (C)">Maleimide-PEO2-Biotin (C)</option>
          <option value="Malonyl (C)">Malonyl (C)</option>
          <option value="Malonyl (S)">Malonyl (S)</option>
          <option value="Menadione (C)">Menadione (C)</option>
          <option value="Menadione (K)">Menadione (K)</option>
          <option value="Menadione-HQ (C)">Menadione-HQ (C)</option>
          <option value="Menadione-HQ (K)">Menadione-HQ (K)</option>
          <option value="MercaptoEthanol (S)">MercaptoEthanol (S)</option>
          <option value="MercaptoEthanol (T)">MercaptoEthanol (T)</option>
          <option value="Met-&gt;Aha (M)">Met-&gt;Aha (M)</option>
          <option value="Met-&gt;Ala (M)">Met-&gt;Ala (M)</option>
          <option value="Met-&gt;Arg (M)">Met-&gt;Arg (M)</option>
          <option value="Met-&gt;Asn (M)">Met-&gt;Asn (M)</option>
          <option value="Met-&gt;Asp (M)">Met-&gt;Asp (M)</option>
          <option value="Met-&gt;Cys (M)">Met-&gt;Cys (M)</option>
          <option value="Met-&gt;Gln (M)">Met-&gt;Gln (M)</option>
          <option value="Met-&gt;Glu (M)">Met-&gt;Glu (M)</option>
          <option value="Met-&gt;Gly (M)">Met-&gt;Gly (M)</option>
          <option value="Met-&gt;His (M)">Met-&gt;His (M)</option>
          <option value="Met-&gt;Hpg (M)">Met-&gt;Hpg (M)</option>
          <option value="Met-&gt;Hse (C-term M)">Met-&gt;Hse (C-term M)</option>
          <option value="Met-&gt;Hsl (C-term M)">Met-&gt;Hsl (C-term M)</option>
          <option value="Met-&gt;Lys (M)">Met-&gt;Lys (M)</option>
          <option value="Met-&gt;Phe (M)">Met-&gt;Phe (M)</option>
          <option value="Met-&gt;Pro (M)">Met-&gt;Pro (M)</option>
          <option value="Met-&gt;Ser (M)">Met-&gt;Ser (M)</option>
          <option value="Met-&gt;Thr (M)">Met-&gt;Thr (M)</option>
          <option value="Met-&gt;Trp (M)">Met-&gt;Trp (M)</option>
          <option value="Met-&gt;Tyr (M)">Met-&gt;Tyr (M)</option>
          <option value="Met-&gt;Val (M)">Met-&gt;Val (M)</option>
          <option value="Met-&gt;Xle (M)">Met-&gt;Xle (M)</option>
          <option value="Methyl (C)">Methyl (C)</option>
          <option value="Methyl (C-term)">Methyl (C-term)</option>
          <option value="Methyl (D)">Methyl (D)</option>
          <option value="Methyl (E)">Methyl (E)</option>
          <option value="Methyl (H)">Methyl (H)</option>
          <option value="Methyl (I)">Methyl (I)</option>
          <option value="Methyl (K)">Methyl (K)</option>
          <option value="Methyl (L)">Methyl (L)</option>
          <option value="Methyl (N)">Methyl (N)</option>
          <option value="Methyl (N-term)">Methyl (N-term)</option>
          <option value="Methyl (Q)">Methyl (Q)</option>
          <option value="Methyl (R)">Methyl (R)</option>
          <option value="Methyl (S)">Methyl (S)</option>
          <option value="Methyl (T)">Methyl (T)</option>
          <option value="Methyl+Acetyl:2H(3) (K)">Methyl+Acetyl:2H(3) (K)</option>
          <option value="Methyl+Deamidated (N)">Methyl+Deamidated (N)</option>
          <option value="Methyl+Deamidated (Q)">Methyl+Deamidated (Q)</option>
          <option value="Methyl-PEO12-Maleimide (C)">Methyl-PEO12-Maleimide (C)</option>
          <option value="Methyl:2H(2) (K)">Methyl:2H(2) (K)</option>
          <option value="Methyl:2H(3) (C-term)">Methyl:2H(3) (C-term)</option>
          <option value="Methyl:2H(3) (D)">Methyl:2H(3) (D)</option>
          <option value="Methyl:2H(3) (E)">Methyl:2H(3) (E)</option>
          <option value="Methyl:2H(3) (K)">Methyl:2H(3) (K)</option>
          <option value="Methyl:2H(3) (R)">Methyl:2H(3) (R)</option>
          <option value="Methyl:2H(3)+Acetyl:2H(3) (K)">Methyl:2H(3)+Acetyl:2H(3) (K)</option>
          <option value="Methyl:2H(3)13C(1) (K)">Methyl:2H(3)13C(1) (K)</option>
          <option value="Methyl:2H(3)13C(1) (R)">Methyl:2H(3)13C(1) (R)</option>
          <option value="Methylamine (S)">Methylamine (S)</option>
          <option value="Methylamine (T)">Methylamine (T)</option>
          <option value="Methylmalonylation (S)">Methylmalonylation (S)</option>
          <option value="Methylphosphonate (S)">Methylphosphonate (S)</option>
          <option value="Methylphosphonate (T)">Methylphosphonate (T)</option>
          <option value="Methylphosphonate (Y)">Methylphosphonate (Y)</option>
          <option value="Methylpyrroline (K)">Methylpyrroline (K)</option>
          <option value="Methylthio (C)">Methylthio (C)</option>
          <option value="Methylthio (D)">Methylthio (D)</option>
          <option value="Methylthio (K)">Methylthio (K)</option>
          <option value="Methylthio (N)">Methylthio (N)</option>
          <option value="Methylthio (N-term)">Methylthio (N-term)</option>
          <option value="Molybdopterin (C)">Molybdopterin (C)</option>
          <option value="MolybdopterinGD (C)">MolybdopterinGD (C)</option>
          <option value="MolybdopterinGD (D)">MolybdopterinGD (D)</option>
          <option value="MolybdopterinGD+Delta:S(-1)Se(1) (C)">MolybdopterinGD+Delta:S(-1)Se(1) (C)</option>
          <option value="MurNAc (A)">MurNAc (A)</option>
          <option value="Myristoyl (C)">Myristoyl (C)</option>
          <option value="Myristoyl (K)">Myristoyl (K)</option>
          <option value="Myristoyl (N-term G)">Myristoyl (N-term G)</option>
          <option value="N-dimethylphosphate (S)">N-dimethylphosphate (S)</option>
          <option value="NA-LNO2 (C)">NA-LNO2 (C)</option>
          <option value="NA-LNO2 (H)">NA-LNO2 (H)</option>
          <option value="NA-OA-NO2 (C)">NA-OA-NO2 (C)</option>
          <option value="NA-OA-NO2 (H)">NA-OA-NO2 (H)</option>
          <option value="NBS (W)">NBS (W)</option>
          <option value="NBS:13C(6) (W)">NBS:13C(6) (W)</option>
          <option value="NDA (K)">NDA (K)</option>
          <option value="NDA (N-term)">NDA (N-term)</option>
          <option value="NEIAA (C)">NEIAA (C)</option>
          <option value="NEIAA (Y)">NEIAA (Y)</option>
          <option value="NEIAA:2H(5) (C)">NEIAA:2H(5) (C)</option>
          <option value="NEIAA:2H(5) (Y)">NEIAA:2H(5) (Y)</option>
          <option value="NEM:2H(5) (C)">NEM:2H(5) (C)</option>
          <option value="NEM:2H(5)+H2O (C)">NEM:2H(5)+H2O (C)</option>
          <option value="NEMsulfur (C)">NEMsulfur (C)</option>
          <option value="NEMsulfurWater (C)">NEMsulfurWater (C)</option>
          <option value="NHS-LC-Biotin (K)">NHS-LC-Biotin (K)</option>
          <option value="NHS-LC-Biotin (N-term)">NHS-LC-Biotin (N-term)</option>
          <option value="NHS-fluorescein (K)">NHS-fluorescein (K)</option>
          <option value="NIC (K)">NIC (K)</option>
          <option value="NIC (N-term)">NIC (N-term)</option>
          <option value="NIPCAM (C)">NIPCAM (C)</option>
          <option value="NO_SMX_SEMD (C)">NO_SMX_SEMD (C)</option>
          <option value="NO_SMX_SIMD (C)">NO_SMX_SIMD (C)</option>
          <option value="NO_SMX_SMCT (C)">NO_SMX_SMCT (C)</option>
          <option value="Nethylmaleimide (C)">Nethylmaleimide (C)</option>
          <option value="Nethylmaleimide+water (C)">Nethylmaleimide+water (C)</option>
          <option value="Nethylmaleimide+water (K)">Nethylmaleimide+water (K)</option>
          <option value="NeuAc (N)">NeuAc (N)</option>
          <option value="NeuAc (S)">NeuAc (S)</option>
          <option value="NeuAc (T)">NeuAc (T)</option>
          <option value="NeuGc (N)">NeuGc (N)</option>
          <option value="NeuGc (S)">NeuGc (S)</option>
          <option value="NeuGc (T)">NeuGc (T)</option>
          <option value="Nitro (W)">Nitro (W)</option>
          <option value="Nitro (Y)">Nitro (Y)</option>
          <option value="Nitrosyl (C)">Nitrosyl (C)</option>
          <option value="Nmethylmaleimide (C)">Nmethylmaleimide (C)</option>
          <option value="Nmethylmaleimide (K)">Nmethylmaleimide (K)</option>
          <option value="Nmethylmaleimide+water (C)">Nmethylmaleimide+water (C)</option>
          <option value="O-Dimethylphosphate (S)">O-Dimethylphosphate (S)</option>
          <option value="O-Dimethylphosphate (T)">O-Dimethylphosphate (T)</option>
          <option value="O-Dimethylphosphate (Y)">O-Dimethylphosphate (Y)</option>
          <option value="O-Et-N-diMePhospho (S)">O-Et-N-diMePhospho (S)</option>
          <option value="O-Isopropylmethylphosphonate (S)">O-Isopropylmethylphosphonate (S)</option>
          <option value="O-Isopropylmethylphosphonate (T)">O-Isopropylmethylphosphonate (T)</option>
          <option value="O-Isopropylmethylphosphonate (Y)">O-Isopropylmethylphosphonate (Y)</option>
          <option value="O-Methylphosphate (S)">O-Methylphosphate (S)</option>
          <option value="O-Methylphosphate (T)">O-Methylphosphate (T)</option>
          <option value="O-Methylphosphate (Y)">O-Methylphosphate (Y)</option>
          <option value="O-pinacolylmethylphosphonate (H)">O-pinacolylmethylphosphonate (H)</option>
          <option value="O-pinacolylmethylphosphonate (K)">O-pinacolylmethylphosphonate (K)</option>
          <option value="O-pinacolylmethylphosphonate (S)">O-pinacolylmethylphosphonate (S)</option>
          <option value="O-pinacolylmethylphosphonate (T)">O-pinacolylmethylphosphonate (T)</option>
          <option value="O-pinacolylmethylphosphonate (Y)">O-pinacolylmethylphosphonate (Y)</option>
          <option value="Octanoyl (C)">Octanoyl (C)</option>
          <option value="Octanoyl (S)">Octanoyl (S)</option>
          <option value="Octanoyl (T)">Octanoyl (T)</option>
          <option value="OxArgBiotin (R)">OxArgBiotin (R)</option>
          <option value="OxArgBiotinRed (R)">OxArgBiotinRed (R)</option>
          <option value="OxLysBiotin (K)">OxLysBiotin (K)</option>
          <option value="OxLysBiotinRed (K)">OxLysBiotinRed (K)</option>
          <option value="OxProBiotin (P)">OxProBiotin (P)</option>
          <option value="OxProBiotinRed (P)">OxProBiotinRed (P)</option>
          <option value="Oxidation (C)">Oxidation (C)</option>
          <option value="Oxidation (C-term G)">Oxidation (C-term G)</option>
          <option value="Oxidation (D)">Oxidation (D)</option>
          <option value="Oxidation (F)">Oxidation (F)</option>
          <option value="Oxidation (H)">Oxidation (H)</option>
          <option value="Oxidation (K)">Oxidation (K)</option>
          <option value="Oxidation (M)">Oxidation (M)</option>
          <option value="Oxidation (N)">Oxidation (N)</option>
          <option value="Oxidation (P)">Oxidation (P)</option>
          <option value="Oxidation (R)">Oxidation (R)</option>
          <option value="Oxidation (W)">Oxidation (W)</option>
          <option value="Oxidation (Y)">Oxidation (Y)</option>
          <option value="Oxidation+NEM (C)">Oxidation+NEM (C)</option>
          <option value="PEITC (C)">PEITC (C)</option>
          <option value="PEITC (K)">PEITC (K)</option>
          <option value="PEITC (N-term)">PEITC (N-term)</option>
          <option value="PEO-Iodoacetyl-LC-Biotin (C)">PEO-Iodoacetyl-LC-Biotin (C)</option>
          <option value="PET (S)">PET (S)</option>
          <option value="PET (T)">PET (T)</option>
          <option value="PS_Hapten (C)">PS_Hapten (C)</option>
          <option value="PS_Hapten (H)">PS_Hapten (H)</option>
          <option value="PS_Hapten (K)">PS_Hapten (K)</option>
          <option value="Palmitoleyl (C)">Palmitoleyl (C)</option>
          <option value="Palmitoleyl (S)">Palmitoleyl (S)</option>
          <option value="Palmitoleyl (T)">Palmitoleyl (T)</option>
          <option value="Palmitoyl (C)">Palmitoyl (C)</option>
          <option value="Palmitoyl (K)">Palmitoyl (K)</option>
          <option value="Palmitoyl (S)">Palmitoyl (S)</option>
          <option value="Palmitoyl (T)">Palmitoyl (T)</option>
          <option value="Pentylamine (Q)">Pentylamine (Q)</option>
          <option value="Phe-&gt;Ala (F)">Phe-&gt;Ala (F)</option>
          <option value="Phe-&gt;Arg (F)">Phe-&gt;Arg (F)</option>
          <option value="Phe-&gt;Asn (F)">Phe-&gt;Asn (F)</option>
          <option value="Phe-&gt;Asp (F)">Phe-&gt;Asp (F)</option>
          <option value="Phe-&gt;CamCys (F)">Phe-&gt;CamCys (F)</option>
          <option value="Phe-&gt;Cys (F)">Phe-&gt;Cys (F)</option>
          <option value="Phe-&gt;Gln (F)">Phe-&gt;Gln (F)</option>
          <option value="Phe-&gt;Glu (F)">Phe-&gt;Glu (F)</option>
          <option value="Phe-&gt;Gly (F)">Phe-&gt;Gly (F)</option>
          <option value="Phe-&gt;His (F)">Phe-&gt;His (F)</option>
          <option value="Phe-&gt;Lys (F)">Phe-&gt;Lys (F)</option>
          <option value="Phe-&gt;Met (F)">Phe-&gt;Met (F)</option>
          <option value="Phe-&gt;Pro (F)">Phe-&gt;Pro (F)</option>
          <option value="Phe-&gt;Ser (F)">Phe-&gt;Ser (F)</option>
          <option value="Phe-&gt;Thr (F)">Phe-&gt;Thr (F)</option>
          <option value="Phe-&gt;Trp (F)">Phe-&gt;Trp (F)</option>
          <option value="Phe-&gt;Tyr (F)">Phe-&gt;Tyr (F)</option>
          <option value="Phe-&gt;Val (F)">Phe-&gt;Val (F)</option>
          <option value="Phe-&gt;Xle (F)">Phe-&gt;Xle (F)</option>
          <option value="Phenylisocyanate (N-term)">Phenylisocyanate (N-term)</option>
          <option value="Phenylisocyanate:2H(5) (N-term)">Phenylisocyanate:2H(5) (N-term)</option>
          <option value="Phospho (C)">Phospho (C)</option>
          <option value="Phospho (D)">Phospho (D)</option>
          <option value="Phospho (H)">Phospho (H)</option>
          <option value="Phospho (K)">Phospho (K)</option>
          <option value="Phospho (R)">Phospho (R)</option>
          <option value="Phospho (S)">Phospho (S)</option>
          <option value="Phospho (T)">Phospho (T)</option>
          <option value="Phospho (Y)">Phospho (Y)</option>
          <option value="PhosphoHex (S)">PhosphoHex (S)</option>
          <option value="PhosphoHexNAc (S)">PhosphoHexNAc (S)</option>
          <option value="PhosphoHexNAc (T)">PhosphoHexNAc (T)</option>
          <option value="PhosphoUridine (H)">PhosphoUridine (H)</option>
          <option value="PhosphoUridine (Y)">PhosphoUridine (Y)</option>
          <option value="Phosphoadenosine (H)">Phosphoadenosine (H)</option>
          <option value="Phosphoadenosine (K)">Phosphoadenosine (K)</option>
          <option value="Phosphoadenosine (T)">Phosphoadenosine (T)</option>
          <option value="Phosphoadenosine (Y)">Phosphoadenosine (Y)</option>
          <option value="Phosphogluconoylation (K)">Phosphogluconoylation (K)</option>
          <option value="Phosphogluconoylation (N-term)">Phosphogluconoylation (N-term)</option>
          <option value="Phosphoguanosine (H)">Phosphoguanosine (H)</option>
          <option value="Phosphoguanosine (K)">Phosphoguanosine (K)</option>
          <option value="Phosphopantetheine (S)">Phosphopantetheine (S)</option>
          <option value="Phosphopropargyl (S)">Phosphopropargyl (S)</option>
          <option value="Phosphopropargyl (T)">Phosphopropargyl (T)</option>
          <option value="Phosphopropargyl (Y)">Phosphopropargyl (Y)</option>
          <option value="PhosphoribosyldephosphoCoA (S)">PhosphoribosyldephosphoCoA (S)</option>
          <option value="Phycocyanobilin (C)">Phycocyanobilin (C)</option>
          <option value="Phycoerythrobilin (C)">Phycoerythrobilin (C)</option>
          <option value="Phytochromobilin (C)">Phytochromobilin (C)</option>
          <option value="Piperidine (K)">Piperidine (K)</option>
          <option value="Piperidine (N-term)">Piperidine (N-term)</option>
          <option value="Pro-&gt;Ala (P)">Pro-&gt;Ala (P)</option>
          <option value="Pro-&gt;Arg (P)">Pro-&gt;Arg (P)</option>
          <option value="Pro-&gt;Asn (P)">Pro-&gt;Asn (P)</option>
          <option value="Pro-&gt;Asp (P)">Pro-&gt;Asp (P)</option>
          <option value="Pro-&gt;Cys (P)">Pro-&gt;Cys (P)</option>
          <option value="Pro-&gt;Gln (P)">Pro-&gt;Gln (P)</option>
          <option value="Pro-&gt;Glu (P)">Pro-&gt;Glu (P)</option>
          <option value="Pro-&gt;Gly (P)">Pro-&gt;Gly (P)</option>
          <option value="Pro-&gt;His (P)">Pro-&gt;His (P)</option>
          <option value="Pro-&gt;Lys (P)">Pro-&gt;Lys (P)</option>
          <option value="Pro-&gt;Met (P)">Pro-&gt;Met (P)</option>
          <option value="Pro-&gt;Phe (P)">Pro-&gt;Phe (P)</option>
          <option value="Pro-&gt;Pyrrolidinone (P)">Pro-&gt;Pyrrolidinone (P)</option>
          <option value="Pro-&gt;Pyrrolidone (P)">Pro-&gt;Pyrrolidone (P)</option>
          <option value="Pro-&gt;Ser (P)">Pro-&gt;Ser (P)</option>
          <option value="Pro-&gt;Thr (P)">Pro-&gt;Thr (P)</option>
          <option value="Pro-&gt;Trp (P)">Pro-&gt;Trp (P)</option>
          <option value="Pro-&gt;Tyr (P)">Pro-&gt;Tyr (P)</option>
          <option value="Pro-&gt;Val (P)">Pro-&gt;Val (P)</option>
          <option value="Pro-&gt;Xle (P)">Pro-&gt;Xle (P)</option>
          <option value="Pro-&gt;pyro-Glu (P)">Pro-&gt;pyro-Glu (P)</option>
          <option value="Propargylamine (C-term)">Propargylamine (C-term)</option>
          <option value="Propargylamine (D)">Propargylamine (D)</option>
          <option value="Propargylamine (E)">Propargylamine (E)</option>
          <option value="Propionamide (C)">Propionamide (C)</option>
          <option value="Propionamide (K)">Propionamide (K)</option>
          <option value="Propionamide (N-term)">Propionamide (N-term)</option>
          <option value="Propionamide:2H(3) (C)">Propionamide:2H(3) (C)</option>
          <option value="Propionyl (K)">Propionyl (K)</option>
          <option value="Propionyl (N-term)">Propionyl (N-term)</option>
          <option value="Propionyl (S)">Propionyl (S)</option>
          <option value="Propionyl (T)">Propionyl (T)</option>
          <option value="Propionyl:13C(3) (K)">Propionyl:13C(3) (K)</option>
          <option value="Propionyl:13C(3) (N-term)">Propionyl:13C(3) (N-term)</option>
          <option value="Propiophenone (C)">Propiophenone (C)</option>
          <option value="Propiophenone (H)">Propiophenone (H)</option>
          <option value="Propiophenone (K)">Propiophenone (K)</option>
          <option value="Propiophenone (R)">Propiophenone (R)</option>
          <option value="Propiophenone (S)">Propiophenone (S)</option>
          <option value="Propiophenone (T)">Propiophenone (T)</option>
          <option value="Propiophenone (W)">Propiophenone (W)</option>
          <option value="Propyl (K)">Propyl (K)</option>
          <option value="Propyl (N-term)">Propyl (N-term)</option>
          <option value="Propyl:2H(6) (K)">Propyl:2H(6) (K)</option>
          <option value="Propyl:2H(6) (N-term)">Propyl:2H(6) (N-term)</option>
          <option value="PropylNAGthiazoline (C)">PropylNAGthiazoline (C)</option>
          <option value="Puromycin (C-term)">Puromycin (C-term)</option>
          <option value="PyMIC (N-term)">PyMIC (N-term)</option>
          <option value="PyridoxalPhosphate (K)">PyridoxalPhosphate (K)</option>
          <option value="PyridoxalPhosphateH2 (K)">PyridoxalPhosphateH2 (K)</option>
          <option value="Pyridylacetyl (K)">Pyridylacetyl (K)</option>
          <option value="Pyridylacetyl (N-term)">Pyridylacetyl (N-term)</option>
          <option value="Pyridylethyl (C)">Pyridylethyl (C)</option>
          <option value="Pyro-carbamidomethyl (N-term C)">Pyro-carbamidomethyl (N-term C)</option>
          <option value="PyruvicAcidIminyl (K)">PyruvicAcidIminyl (K)</option>
          <option value="QAT (C)">QAT (C)</option>
          <option value="QAT:2H(3) (C)">QAT:2H(3) (C)</option>
          <option value="QEQTGG (K)">QEQTGG (K)</option>
          <option value="QQQTGG (K)">QQQTGG (K)</option>
          <option value="QTGG (K)">QTGG (K)</option>
          <option value="Quinone (W)">Quinone (W)</option>
          <option value="Quinone (Y)">Quinone (Y)</option>
          <option value="RNPXlink1 (C)">RNPXlink1 (C)</option>
          <option value="RNPXlink2 (F)">RNPXlink2 (F)</option>
          <option value="RNPXlink2 (K)">RNPXlink2 (K)</option>
          <option value="RNPXlink2 (L)">RNPXlink2 (L)</option>
          <option value="RNPXlink3 (C)">RNPXlink3 (C)</option>
          <option value="RNPXlink3 (F)">RNPXlink3 (F)</option>
          <option value="RNPXlink4 (C)">RNPXlink4 (C)</option>
          <option value="RNPXlink5 (F)">RNPXlink5 (F)</option>
          <option value="RNPXlink5 (Y)">RNPXlink5 (Y)</option>
          <option value="Retinylidene (K)">Retinylidene (K)</option>
          <option value="SMA (K)">SMA (K)</option>
          <option value="SMA (N-term)">SMA (N-term)</option>
          <option value="SMCC-maleimide (C)">SMCC-maleimide (C)</option>
          <option value="SPITC (K)">SPITC (K)</option>
          <option value="SPITC (N-term)">SPITC (N-term)</option>
          <option value="SPITC:13C(6) (K)">SPITC:13C(6) (K)</option>
          <option value="SPITC:13C(6) (N-term)">SPITC:13C(6) (N-term)</option>
          <option value="SUMO2135 (K)">SUMO2135 (K)</option>
          <option value="SUMO3549 (K)">SUMO3549 (K)</option>
          <option value="Saligenin (H)">Saligenin (H)</option>
          <option value="Saligenin (K)">Saligenin (K)</option>
          <option value="SecCarbamidomethyl (C)">SecCarbamidomethyl (C)</option>
          <option value="SecNEM (C)">SecNEM (C)</option>
          <option value="SecNEM:2H(5) (C)">SecNEM:2H(5) (C)</option>
          <option value="Ser-&gt;Ala (S)">Ser-&gt;Ala (S)</option>
          <option value="Ser-&gt;Arg (S)">Ser-&gt;Arg (S)</option>
          <option value="Ser-&gt;Asn (S)">Ser-&gt;Asn (S)</option>
          <option value="Ser-&gt;Asp (S)">Ser-&gt;Asp (S)</option>
          <option value="Ser-&gt;Cys (S)">Ser-&gt;Cys (S)</option>
          <option value="Ser-&gt;Gln (S)">Ser-&gt;Gln (S)</option>
          <option value="Ser-&gt;Glu (S)">Ser-&gt;Glu (S)</option>
          <option value="Ser-&gt;Gly (S)">Ser-&gt;Gly (S)</option>
          <option value="Ser-&gt;His (S)">Ser-&gt;His (S)</option>
          <option value="Ser-&gt;Lys (S)">Ser-&gt;Lys (S)</option>
          <option value="Ser-&gt;Met (S)">Ser-&gt;Met (S)</option>
          <option value="Ser-&gt;Phe (S)">Ser-&gt;Phe (S)</option>
          <option value="Ser-&gt;Pro (S)">Ser-&gt;Pro (S)</option>
          <option value="Ser-&gt;Thr (S)">Ser-&gt;Thr (S)</option>
          <option value="Ser-&gt;Trp (S)">Ser-&gt;Trp (S)</option>
          <option value="Ser-&gt;Tyr (S)">Ser-&gt;Tyr (S)</option>
          <option value="Ser-&gt;Val (S)">Ser-&gt;Val (S)</option>
          <option value="Ser-&gt;Xle (S)">Ser-&gt;Xle (S)</option>
          <option value="Succinyl (K)">Succinyl (K)</option>
          <option value="Succinyl (N-term)">Succinyl (N-term)</option>
          <option value="Succinyl:13C(4) (K)">Succinyl:13C(4) (K)</option>
          <option value="Succinyl:13C(4) (N-term)">Succinyl:13C(4) (N-term)</option>
          <option value="Succinyl:2H(4) (K)">Succinyl:2H(4) (K)</option>
          <option value="Succinyl:2H(4) (N-term)">Succinyl:2H(4) (N-term)</option>
          <option value="SulfanilicAcid (C-term)">SulfanilicAcid (C-term)</option>
          <option value="SulfanilicAcid (D)">SulfanilicAcid (D)</option>
          <option value="SulfanilicAcid (E)">SulfanilicAcid (E)</option>
          <option value="SulfanilicAcid:13C(6) (C-term)">SulfanilicAcid:13C(6) (C-term)</option>
          <option value="SulfanilicAcid:13C(6) (D)">SulfanilicAcid:13C(6) (D)</option>
          <option value="SulfanilicAcid:13C(6) (E)">SulfanilicAcid:13C(6) (E)</option>
          <option value="Sulfide (C)">Sulfide (C)</option>
          <option value="Sulfide (D)">Sulfide (D)</option>
          <option value="Sulfide (W)">Sulfide (W)</option>
          <option value="Sulfo (C)">Sulfo (C)</option>
          <option value="Sulfo (S)">Sulfo (S)</option>
          <option value="Sulfo (T)">Sulfo (T)</option>
          <option value="Sulfo (Y)">Sulfo (Y)</option>
          <option value="Sulfo-NHS-LC-LC-Biotin (K)">Sulfo-NHS-LC-LC-Biotin (K)</option>
          <option value="Sulfo-NHS-LC-LC-Biotin (N-term)">Sulfo-NHS-LC-LC-Biotin (N-term)</option>
          <option value="SulfoGMBS (C)">SulfoGMBS (C)</option>
          <option value="SulfurDioxide (C)">SulfurDioxide (C)</option>
          <option value="TAMRA-FP (S)">TAMRA-FP (S)</option>
          <option value="TAMRA-FP (Y)">TAMRA-FP (Y)</option>
          <option value="TMAB (K)">TMAB (K)</option>
          <option value="TMAB (N-term)">TMAB (N-term)</option>
          <option value="TMAB:2H(9) (K)">TMAB:2H(9) (K)</option>
          <option value="TMAB:2H(9) (N-term)">TMAB:2H(9) (N-term)</option>
          <option value="TMPP-Ac (N-term)">TMPP-Ac (N-term)</option>
          <option value="TMT (H)">TMT (H)</option>
          <option value="TMT (K)">TMT (K)</option>
          <option value="TMT (N-term)">TMT (N-term)</option>
          <option value="TMT (S)">TMT (S)</option>
          <option value="TMT (T)">TMT (T)</option>
          <option value="TMT2plex (H)">TMT2plex (H)</option>
          <option value="TMT2plex (K)">TMT2plex (K)</option>
          <option value="TMT2plex (N-term)">TMT2plex (N-term)</option>
          <option value="TMT2plex (S)">TMT2plex (S)</option>
          <option value="TMT2plex (T)">TMT2plex (T)</option>
          <option value="TMT6plex (H)">TMT6plex (H)</option>
          <option value="TMT6plex (K)">TMT6plex (K)</option>
          <option value="TMT6plex (N-term)">TMT6plex (N-term)</option>
          <option value="TMT6plex (S)">TMT6plex (S)</option>
          <option value="TMT6plex (T)">TMT6plex (T)</option>
          <option value="TNBS (K)">TNBS (K)</option>
          <option value="TNBS (N-term)">TNBS (N-term)</option>
          <option value="Thiadiazole (C)">Thiadiazole (C)</option>
          <option value="Thiazolidine (N-term C)">Thiazolidine (N-term C)</option>
          <option value="Thioacyl (K)">Thioacyl (K)</option>
          <option value="Thioacyl (N-term)">Thioacyl (N-term)</option>
          <option value="Thiophos-S-S-biotin (S)">Thiophos-S-S-biotin (S)</option>
          <option value="Thiophos-S-S-biotin (T)">Thiophos-S-S-biotin (T)</option>
          <option value="Thiophos-S-S-biotin (Y)">Thiophos-S-S-biotin (Y)</option>
          <option value="Thiophospho (S)">Thiophospho (S)</option>
          <option value="Thiophospho (T)">Thiophospho (T)</option>
          <option value="Thiophospho (Y)">Thiophospho (Y)</option>
          <option value="Thr-&gt;Ala (T)">Thr-&gt;Ala (T)</option>
          <option value="Thr-&gt;Arg (T)">Thr-&gt;Arg (T)</option>
          <option value="Thr-&gt;Asn (T)">Thr-&gt;Asn (T)</option>
          <option value="Thr-&gt;Asp (T)">Thr-&gt;Asp (T)</option>
          <option value="Thr-&gt;Cys (T)">Thr-&gt;Cys (T)</option>
          <option value="Thr-&gt;Gln (T)">Thr-&gt;Gln (T)</option>
          <option value="Thr-&gt;Glu (T)">Thr-&gt;Glu (T)</option>
          <option value="Thr-&gt;Gly (T)">Thr-&gt;Gly (T)</option>
          <option value="Thr-&gt;His (T)">Thr-&gt;His (T)</option>
          <option value="Thr-&gt;Lys (T)">Thr-&gt;Lys (T)</option>
          <option value="Thr-&gt;Met (T)">Thr-&gt;Met (T)</option>
          <option value="Thr-&gt;Phe (T)">Thr-&gt;Phe (T)</option>
          <option value="Thr-&gt;Pro (T)">Thr-&gt;Pro (T)</option>
          <option value="Thr-&gt;Ser (T)">Thr-&gt;Ser (T)</option>
          <option value="Thr-&gt;Trp (T)">Thr-&gt;Trp (T)</option>
          <option value="Thr-&gt;Tyr (T)">Thr-&gt;Tyr (T)</option>
          <option value="Thr-&gt;Val (T)">Thr-&gt;Val (T)</option>
          <option value="Thr-&gt;Xle (T)">Thr-&gt;Xle (T)</option>
          <option value="Thrbiotinhydrazide (T)">Thrbiotinhydrazide (T)</option>
          <option value="Thyroxine (Y)">Thyroxine (Y)</option>
          <option value="Triiodo (Y)">Triiodo (Y)</option>
          <option value="Triiodothyronine (Y)">Triiodothyronine (Y)</option>
          <option value="Trimethyl (K)">Trimethyl (K)</option>
          <option value="Trimethyl (R)">Trimethyl (R)</option>
          <option value="Trimethyl:13C(3)2H(9) (K)">Trimethyl:13C(3)2H(9) (K)</option>
          <option value="Trimethyl:13C(3)2H(9) (R)">Trimethyl:13C(3)2H(9) (R)</option>
          <option value="Trimethyl:2H(9) (K)">Trimethyl:2H(9) (K)</option>
          <option value="Trimethyl:2H(9) (R)">Trimethyl:2H(9) (R)</option>
          <option value="Trioxidation (C)">Trioxidation (C)</option>
          <option value="Trioxidation (W)">Trioxidation (W)</option>
          <option value="Trioxidation (Y)">Trioxidation (Y)</option>
          <option value="Trp-&gt;Ala (W)">Trp-&gt;Ala (W)</option>
          <option value="Trp-&gt;Arg (W)">Trp-&gt;Arg (W)</option>
          <option value="Trp-&gt;Asn (W)">Trp-&gt;Asn (W)</option>
          <option value="Trp-&gt;Asp (W)">Trp-&gt;Asp (W)</option>
          <option value="Trp-&gt;Cys (W)">Trp-&gt;Cys (W)</option>
          <option value="Trp-&gt;Gln (W)">Trp-&gt;Gln (W)</option>
          <option value="Trp-&gt;Glu (W)">Trp-&gt;Glu (W)</option>
          <option value="Trp-&gt;Gly (W)">Trp-&gt;Gly (W)</option>
          <option value="Trp-&gt;His (W)">Trp-&gt;His (W)</option>
          <option value="Trp-&gt;Hydroxykynurenin (W)">Trp-&gt;Hydroxykynurenin (W)</option>
          <option value="Trp-&gt;Kynurenin (W)">Trp-&gt;Kynurenin (W)</option>
          <option value="Trp-&gt;Lys (W)">Trp-&gt;Lys (W)</option>
          <option value="Trp-&gt;Met (W)">Trp-&gt;Met (W)</option>
          <option value="Trp-&gt;Oxolactone (W)">Trp-&gt;Oxolactone (W)</option>
          <option value="Trp-&gt;Phe (W)">Trp-&gt;Phe (W)</option>
          <option value="Trp-&gt;Pro (W)">Trp-&gt;Pro (W)</option>
          <option value="Trp-&gt;Ser (W)">Trp-&gt;Ser (W)</option>
          <option value="Trp-&gt;Thr (W)">Trp-&gt;Thr (W)</option>
          <option value="Trp-&gt;Tyr (W)">Trp-&gt;Tyr (W)</option>
          <option value="Trp-&gt;Val (W)">Trp-&gt;Val (W)</option>
          <option value="Trp-&gt;Xle (W)">Trp-&gt;Xle (W)</option>
          <option value="Tyr-&gt;Ala (Y)">Tyr-&gt;Ala (Y)</option>
          <option value="Tyr-&gt;Arg (Y)">Tyr-&gt;Arg (Y)</option>
          <option value="Tyr-&gt;Asn (Y)">Tyr-&gt;Asn (Y)</option>
          <option value="Tyr-&gt;Asp (Y)">Tyr-&gt;Asp (Y)</option>
          <option value="Tyr-&gt;Cys (Y)">Tyr-&gt;Cys (Y)</option>
          <option value="Tyr-&gt;Dha (Y)">Tyr-&gt;Dha (Y)</option>
          <option value="Tyr-&gt;Gln (Y)">Tyr-&gt;Gln (Y)</option>
          <option value="Tyr-&gt;Glu (Y)">Tyr-&gt;Glu (Y)</option>
          <option value="Tyr-&gt;Gly (Y)">Tyr-&gt;Gly (Y)</option>
          <option value="Tyr-&gt;His (Y)">Tyr-&gt;His (Y)</option>
          <option value="Tyr-&gt;Lys (Y)">Tyr-&gt;Lys (Y)</option>
          <option value="Tyr-&gt;Met (Y)">Tyr-&gt;Met (Y)</option>
          <option value="Tyr-&gt;Phe (Y)">Tyr-&gt;Phe (Y)</option>
          <option value="Tyr-&gt;Pro (Y)">Tyr-&gt;Pro (Y)</option>
          <option value="Tyr-&gt;Ser (Y)">Tyr-&gt;Ser (Y)</option>
          <option value="Tyr-&gt;Thr (Y)">Tyr-&gt;Thr (Y)</option>
          <option value="Tyr-&gt;Trp (Y)">Tyr-&gt;Trp (Y)</option>
          <option value="Tyr-&gt;Val (Y)">Tyr-&gt;Val (Y)</option>
          <option value="Tyr-&gt;Xle (Y)">Tyr-&gt;Xle (Y)</option>
          <option value="Ub-Br2 (C)">Ub-Br2 (C)</option>
          <option value="Ub-VME (C)">Ub-VME (C)</option>
          <option value="Ub-amide (C)">Ub-amide (C)</option>
          <option value="Ub-fluorescein (C)">Ub-fluorescein (C)</option>
          <option value="UgiJoullie (D)">UgiJoullie (D)</option>
          <option value="UgiJoullie (E)">UgiJoullie (E)</option>
          <option value="UgiJoullieProGly (D)">UgiJoullieProGly (D)</option>
          <option value="UgiJoullieProGly (E)">UgiJoullieProGly (E)</option>
          <option value="UgiJoullieProGlyProGly (D)">UgiJoullieProGlyProGly (D)</option>
          <option value="UgiJoullieProGlyProGly (E)">UgiJoullieProGlyProGly (E)</option>
          <option value="VFQQQTGG (K)">VFQQQTGG (K)</option>
          <option value="VIEVYQEQTGG (K)">VIEVYQEQTGG (K)</option>
          <option value="Val-&gt;Ala (V)">Val-&gt;Ala (V)</option>
          <option value="Val-&gt;Arg (V)">Val-&gt;Arg (V)</option>
          <option value="Val-&gt;Asn (V)">Val-&gt;Asn (V)</option>
          <option value="Val-&gt;Asp (V)">Val-&gt;Asp (V)</option>
          <option value="Val-&gt;Cys (V)">Val-&gt;Cys (V)</option>
          <option value="Val-&gt;Gln (V)">Val-&gt;Gln (V)</option>
          <option value="Val-&gt;Glu (V)">Val-&gt;Glu (V)</option>
          <option value="Val-&gt;Gly (V)">Val-&gt;Gly (V)</option>
          <option value="Val-&gt;His (V)">Val-&gt;His (V)</option>
          <option value="Val-&gt;Lys (V)">Val-&gt;Lys (V)</option>
          <option value="Val-&gt;Met (V)">Val-&gt;Met (V)</option>
          <option value="Val-&gt;Phe (V)">Val-&gt;Phe (V)</option>
          <option value="Val-&gt;Pro (V)">Val-&gt;Pro (V)</option>
          <option value="Val-&gt;Ser (V)">Val-&gt;Ser (V)</option>
          <option value="Val-&gt;Thr (V)">Val-&gt;Thr (V)</option>
          <option value="Val-&gt;Trp (V)">Val-&gt;Trp (V)</option>
          <option value="Val-&gt;Tyr (V)">Val-&gt;Tyr (V)</option>
          <option value="Val-&gt;Xle (V)">Val-&gt;Xle (V)</option>
          <option value="Withaferin (C)">Withaferin (C)</option>
          <option value="Xle-&gt;Ala (I)">Xle-&gt;Ala (I)</option>
          <option value="Xle-&gt;Ala (L)">Xle-&gt;Ala (L)</option>
          <option value="Xle-&gt;Arg (I)">Xle-&gt;Arg (I)</option>
          <option value="Xle-&gt;Arg (L)">Xle-&gt;Arg (L)</option>
          <option value="Xle-&gt;Asn (I)">Xle-&gt;Asn (I)</option>
          <option value="Xle-&gt;Asn (L)">Xle-&gt;Asn (L)</option>
          <option value="Xle-&gt;Asp (I)">Xle-&gt;Asp (I)</option>
          <option value="Xle-&gt;Asp (L)">Xle-&gt;Asp (L)</option>
          <option value="Xle-&gt;Cys (I)">Xle-&gt;Cys (I)</option>
          <option value="Xle-&gt;Cys (L)">Xle-&gt;Cys (L)</option>
          <option value="Xle-&gt;Gln (I)">Xle-&gt;Gln (I)</option>
          <option value="Xle-&gt;Gln (L)">Xle-&gt;Gln (L)</option>
          <option value="Xle-&gt;Glu (I)">Xle-&gt;Glu (I)</option>
          <option value="Xle-&gt;Glu (L)">Xle-&gt;Glu (L)</option>
          <option value="Xle-&gt;Gly (I)">Xle-&gt;Gly (I)</option>
          <option value="Xle-&gt;Gly (L)">Xle-&gt;Gly (L)</option>
          <option value="Xle-&gt;His (I)">Xle-&gt;His (I)</option>
          <option value="Xle-&gt;His (L)">Xle-&gt;His (L)</option>
          <option value="Xle-&gt;Lys (I)">Xle-&gt;Lys (I)</option>
          <option value="Xle-&gt;Lys (L)">Xle-&gt;Lys (L)</option>
          <option value="Xle-&gt;Met (I)">Xle-&gt;Met (I)</option>
          <option value="Xle-&gt;Met (L)">Xle-&gt;Met (L)</option>
          <option value="Xle-&gt;Phe (I)">Xle-&gt;Phe (I)</option>
          <option value="Xle-&gt;Phe (L)">Xle-&gt;Phe (L)</option>
          <option value="Xle-&gt;Pro (I)">Xle-&gt;Pro (I)</option>
          <option value="Xle-&gt;Pro (L)">Xle-&gt;Pro (L)</option>
          <option value="Xle-&gt;Ser (I)">Xle-&gt;Ser (I)</option>
          <option value="Xle-&gt;Ser (L)">Xle-&gt;Ser (L)</option>
          <option value="Xle-&gt;Thr (I)">Xle-&gt;Thr (I)</option>
          <option value="Xle-&gt;Thr (L)">Xle-&gt;Thr (L)</option>
          <option value="Xle-&gt;Trp (I)">Xle-&gt;Trp (I)</option>
          <option value="Xle-&gt;Trp (L)">Xle-&gt;Trp (L)</option>
          <option value="Xle-&gt;Tyr (I)">Xle-&gt;Tyr (I)</option>
          <option value="Xle-&gt;Tyr (L)">Xle-&gt;Tyr (L)</option>
          <option value="Xle-&gt;Val (I)">Xle-&gt;Val (I)</option>
          <option value="Xle-&gt;Val (L)">Xle-&gt;Val (L)</option>
          <option value="Xlink:B10621 (C)">Xlink:B10621 (C)</option>
          <option value="Xlink:DMP (K)">Xlink:DMP (K)</option>
          <option value="Xlink:DMP-de (K)">Xlink:DMP-de (K)</option>
          <option value="Xlink:DMP-s (K)">Xlink:DMP-s (K)</option>
          <option value="Xlink:DSS (K)">Xlink:DSS (K)</option>
          <option value="Xlink:DST (K)">Xlink:DST (K)</option>
          <option value="Xlink:DTSSP (K)">Xlink:DTSSP (K)</option>
          <option value="Xlink:EGS (K)">Xlink:EGS (K)</option>
          <option value="Xlink:EGScleaved (K)">Xlink:EGScleaved (K)</option>
          <option value="Xlink:SMCC (C)">Xlink:SMCC (C)</option>
          <option value="Xlink:SSD (K)">Xlink:SSD (K)</option>
          <option value="ZGB (K)">ZGB (K)</option>
          <option value="ZGB (N-term)">ZGB (N-term)</option>
          <option value="a-type-ion (C-term)">a-type-ion (C-term)</option>
          <option value="azole (C)">azole (C)</option>
          <option value="azole (S)">azole (S)</option>
          <option value="benzylguanidine (K)">benzylguanidine (K)</option>
          <option value="biotinAcrolein298 (C)">biotinAcrolein298 (C)</option>
          <option value="biotinAcrolein298 (H)">biotinAcrolein298 (H)</option>
          <option value="biotinAcrolein298 (K)">biotinAcrolein298 (K)</option>
          <option value="bisANS-sulfonates (K)">bisANS-sulfonates (K)</option>
          <option value="bisANS-sulfonates (S)">bisANS-sulfonates (S)</option>
          <option value="bisANS-sulfonates (T)">bisANS-sulfonates (T)</option>
          <option value="cGMP (C)">cGMP (C)</option>
          <option value="cGMP (S)">cGMP (S)</option>
          <option value="cGMP+RMP-loss (C)">cGMP+RMP-loss (C)</option>
          <option value="cGMP+RMP-loss (S)">cGMP+RMP-loss (S)</option>
          <option value="cysTMT (C)">cysTMT (C)</option>
          <option value="cysTMT6plex (C)">cysTMT6plex (C)</option>
          <option value="dHex (N)">dHex (N)</option>
          <option value="dHex (S)">dHex (S)</option>
          <option value="dHex (T)">dHex (T)</option>
          <option value="dHex(1)Hex(1) (S)">dHex(1)Hex(1) (S)</option>
          <option value="dHex(1)Hex(1) (T)">dHex(1)Hex(1) (T)</option>
          <option value="dHex(1)Hex(2) (S)">dHex(1)Hex(2) (S)</option>
          <option value="dHex(1)Hex(2) (T)">dHex(1)Hex(2) (T)</option>
          <option value="dHex(1)Hex(3) (S)">dHex(1)Hex(3) (S)</option>
          <option value="dHex(1)Hex(3) (T)">dHex(1)Hex(3) (T)</option>
          <option value="dHex(1)Hex(3)HexNAc(4) (N)">dHex(1)Hex(3)HexNAc(4) (N)</option>
          <option value="dHex(1)Hex(4) (S)">dHex(1)Hex(4) (S)</option>
          <option value="dHex(1)Hex(4) (T)">dHex(1)Hex(4) (T)</option>
          <option value="dHex(1)Hex(4)HexNAc(4) (N)">dHex(1)Hex(4)HexNAc(4) (N)</option>
          <option value="dHex(1)Hex(5) (S)">dHex(1)Hex(5) (S)</option>
          <option value="dHex(1)Hex(5) (T)">dHex(1)Hex(5) (T)</option>
          <option value="dHex(1)Hex(5)HexNAc(4) (N)">dHex(1)Hex(5)HexNAc(4) (N)</option>
          <option value="dHex(1)Hex(5)HexNAc(4)NeuAc(1) (N)">dHex(1)Hex(5)HexNAc(4)NeuAc(1) (N)</option>
          <option value="dHex(1)Hex(5)HexNAc(4)NeuAc(2) (N)">dHex(1)Hex(5)HexNAc(4)NeuAc(2) (N)</option>
          <option value="dHex(1)Hex(6) (S)">dHex(1)Hex(6) (S)</option>
          <option value="dHex(1)Hex(6) (T)">dHex(1)Hex(6) (T)</option>
          <option value="dNIC (K)">dNIC (K)</option>
          <option value="dNIC (N-term)">dNIC (N-term)</option>
          <option value="dichlorination (C)">dichlorination (C)</option>
          <option value="dichlorination (Y)">dichlorination (Y)</option>
          <option value="ethylamino (S)">ethylamino (S)</option>
          <option value="ethylamino (T)">ethylamino (T)</option>
          <option value="ethylsulfonylethyl (C)">ethylsulfonylethyl (C)</option>
          <option value="ethylsulfonylethyl (H)">ethylsulfonylethyl (H)</option>
          <option value="ethylsulfonylethyl (K)">ethylsulfonylethyl (K)</option>
          <option value="glucosone (R)">glucosone (R)</option>
          <option value="glycidamide (K)">glycidamide (K)</option>
          <option value="glycidamide (N-term)">glycidamide (N-term)</option>
          <option value="iTRAQ4plex (H)">iTRAQ4plex (H)</option>
          <option value="iTRAQ4plex (K)">iTRAQ4plex (K)</option>
          <option value="iTRAQ4plex (N-term)">iTRAQ4plex (N-term)</option>
          <option value="iTRAQ4plex (S)">iTRAQ4plex (S)</option>
          <option value="iTRAQ4plex (T)">iTRAQ4plex (T)</option>
          <option value="iTRAQ4plex (Y)">iTRAQ4plex (Y)</option>
          <option value="iTRAQ4plex114 (K)">iTRAQ4plex114 (K)</option>
          <option value="iTRAQ4plex114 (N-term)">iTRAQ4plex114 (N-term)</option>
          <option value="iTRAQ4plex114 (Y)">iTRAQ4plex114 (Y)</option>
          <option value="iTRAQ4plex115 (K)">iTRAQ4plex115 (K)</option>
          <option value="iTRAQ4plex115 (N-term)">iTRAQ4plex115 (N-term)</option>
          <option value="iTRAQ4plex115 (Y)">iTRAQ4plex115 (Y)</option>
          <option value="iTRAQ8plex (H)">iTRAQ8plex (H)</option>
          <option value="iTRAQ8plex (K)">iTRAQ8plex (K)</option>
          <option value="iTRAQ8plex (N-term)">iTRAQ8plex (N-term)</option>
          <option value="iTRAQ8plex (S)">iTRAQ8plex (S)</option>
          <option value="iTRAQ8plex (T)">iTRAQ8plex (T)</option>
          <option value="iTRAQ8plex (Y)">iTRAQ8plex (Y)</option>
          <option value="iTRAQ8plex:13C(6)15N(2) (K)">iTRAQ8plex:13C(6)15N(2) (K)</option>
          <option value="iTRAQ8plex:13C(6)15N(2) (N-term)">iTRAQ8plex:13C(6)15N(2) (N-term)</option>
          <option value="iTRAQ8plex:13C(6)15N(2) (Y)">iTRAQ8plex:13C(6)15N(2) (Y)</option>
          <option value="iodoTMT (C)">iodoTMT (C)</option>
          <option value="iodoTMT (D)">iodoTMT (D)</option>
          <option value="iodoTMT (E)">iodoTMT (E)</option>
          <option value="iodoTMT (H)">iodoTMT (H)</option>
          <option value="iodoTMT (K)">iodoTMT (K)</option>
          <option value="iodoTMT6plex (C)">iodoTMT6plex (C)</option>
          <option value="iodoTMT6plex (D)">iodoTMT6plex (D)</option>
          <option value="iodoTMT6plex (E)">iodoTMT6plex (E)</option>
          <option value="iodoTMT6plex (H)">iodoTMT6plex (H)</option>
          <option value="iodoTMT6plex (K)">iodoTMT6plex (K)</option>
          <option value="lapachenole (C)">lapachenole (C)</option>
          <option value="mTRAQ (H)">mTRAQ (H)</option>
          <option value="mTRAQ (K)">mTRAQ (K)</option>
          <option value="mTRAQ (N-term)">mTRAQ (N-term)</option>
          <option value="mTRAQ (S)">mTRAQ (S)</option>
          <option value="mTRAQ (T)">mTRAQ (T)</option>
          <option value="mTRAQ (Y)">mTRAQ (Y)</option>
          <option value="mTRAQ:13C(3)15N(1) (H)">mTRAQ:13C(3)15N(1) (H)</option>
          <option value="mTRAQ:13C(3)15N(1) (K)">mTRAQ:13C(3)15N(1) (K)</option>
          <option value="mTRAQ:13C(3)15N(1) (N-term)">mTRAQ:13C(3)15N(1) (N-term)</option>
          <option value="mTRAQ:13C(3)15N(1) (S)">mTRAQ:13C(3)15N(1) (S)</option>
          <option value="mTRAQ:13C(3)15N(1) (T)">mTRAQ:13C(3)15N(1) (T)</option>
          <option value="mTRAQ:13C(3)15N(1) (Y)">mTRAQ:13C(3)15N(1) (Y)</option>
          <option value="mTRAQ:13C(6)15N(2) (H)">mTRAQ:13C(6)15N(2) (H)</option>
          <option value="mTRAQ:13C(6)15N(2) (K)">mTRAQ:13C(6)15N(2) (K)</option>
          <option value="mTRAQ:13C(6)15N(2) (N-term)">mTRAQ:13C(6)15N(2) (N-term)</option>
          <option value="mTRAQ:13C(6)15N(2) (S)">mTRAQ:13C(6)15N(2) (S)</option>
          <option value="mTRAQ:13C(6)15N(2) (T)">mTRAQ:13C(6)15N(2) (T)</option>
          <option value="mTRAQ:13C(6)15N(2) (Y)">mTRAQ:13C(6)15N(2) (Y)</option>
          <option value="maleimide (C)">maleimide (C)</option>
          <option value="maleimide (K)">maleimide (K)</option>
          <option value="maleimide3 (C)">maleimide3 (C)</option>
          <option value="maleimide3 (K)">maleimide3 (K)</option>
          <option value="maleimide5 (C)">maleimide5 (C)</option>
          <option value="maleimide5 (K)">maleimide5 (K)</option>
          <option value="methylsulfonylethyl (C)">methylsulfonylethyl (C)</option>
          <option value="methylsulfonylethyl (H)">methylsulfonylethyl (H)</option>
          <option value="methylsulfonylethyl (K)">methylsulfonylethyl (K)</option>
          <option value="phenylsulfonylethyl (C)">phenylsulfonylethyl (C)</option>
          <option value="phosphoRibosyl (D)">phosphoRibosyl (D)</option>
          <option value="phosphoRibosyl (E)">phosphoRibosyl (E)</option>
          <option value="phosphoRibosyl (R)">phosphoRibosyl (R)</option>
          <option value="probiotinhydrazide (P)">probiotinhydrazide (P)</option>
          <option value="pupylation (K)">pupylation (K)</option>
          <option value="pyrophospho (S)">pyrophospho (S)</option>
          <option value="pyrophospho (T)">pyrophospho (T)</option>
          <option value="sulfo+amino (Y)">sulfo+amino (Y)</option>
          <option value="thioacylPA (K)">thioacylPA (K)</option>
          <option value="trifluoro (L)">trifluoro (L)</option>
        </param>
      </repeat>
      <repeat min="0" name="rep_param_variable_modifications" title="param_variable_modifications">
        <param help="(-variable_modifications) e.g. 'Carbamidomethyl (C)' or 'Oxidation (M)'" label="Variable modifications, specified using UniMod (www.unimod.org) terms," name="param_variable_modifications" optional="True" type="select">
          <option value="2-dimethylsuccinyl (C)">2-dimethylsuccinyl (C)</option>
          <option value="2-monomethylsuccinyl (C)">2-monomethylsuccinyl (C)</option>
          <option value="2-nitrobenzyl (Y)">2-nitrobenzyl (Y)</option>
          <option value="2-succinyl (C)">2-succinyl (C)</option>
          <option value="2HPG (R)">2HPG (R)</option>
          <option value="3-deoxyglucosone (R)">3-deoxyglucosone (R)</option>
          <option value="3-phosphoglyceryl (K)">3-phosphoglyceryl (K)</option>
          <option value="3sulfo (N-term)">3sulfo (N-term)</option>
          <option value="4-ONE (C)">4-ONE (C)</option>
          <option value="4-ONE (H)">4-ONE (H)</option>
          <option value="4-ONE (K)">4-ONE (K)</option>
          <option value="4-ONE+Delta:H(-2)O(-1) (C)">4-ONE+Delta:H(-2)O(-1) (C)</option>
          <option value="4-ONE+Delta:H(-2)O(-1) (H)">4-ONE+Delta:H(-2)O(-1) (H)</option>
          <option value="4-ONE+Delta:H(-2)O(-1) (K)">4-ONE+Delta:H(-2)O(-1) (K)</option>
          <option value="4AcAllylGal (C)">4AcAllylGal (C)</option>
          <option value="ADP-Ribosyl (C)">ADP-Ribosyl (C)</option>
          <option value="ADP-Ribosyl (D)">ADP-Ribosyl (D)</option>
          <option value="ADP-Ribosyl (E)">ADP-Ribosyl (E)</option>
          <option value="ADP-Ribosyl (K)">ADP-Ribosyl (K)</option>
          <option value="ADP-Ribosyl (N)">ADP-Ribosyl (N)</option>
          <option value="ADP-Ribosyl (R)">ADP-Ribosyl (R)</option>
          <option value="ADP-Ribosyl (S)">ADP-Ribosyl (S)</option>
          <option value="AEBS (H)">AEBS (H)</option>
          <option value="AEBS (K)">AEBS (K)</option>
          <option value="AEBS (S)">AEBS (S)</option>
          <option value="AEBS (Y)">AEBS (Y)</option>
          <option value="AEC-MAEC (S)">AEC-MAEC (S)</option>
          <option value="AEC-MAEC (T)">AEC-MAEC (T)</option>
          <option value="AEC-MAEC:2H(4) (S)">AEC-MAEC:2H(4) (S)</option>
          <option value="AEC-MAEC:2H(4) (T)">AEC-MAEC:2H(4) (T)</option>
          <option value="AHA-Alkyne (M)">AHA-Alkyne (M)</option>
          <option value="AHA-Alkyne-KDDDD (M)">AHA-Alkyne-KDDDD (M)</option>
          <option value="AHA-SS (M)">AHA-SS (M)</option>
          <option value="AHA-SS_CAM (M)">AHA-SS_CAM (M)</option>
          <option value="AMTzHexNAc2 (N)">AMTzHexNAc2 (N)</option>
          <option value="AMTzHexNAc2 (S)">AMTzHexNAc2 (S)</option>
          <option value="AMTzHexNAc2 (T)">AMTzHexNAc2 (T)</option>
          <option value="AROD (C)">AROD (C)</option>
          <option value="AccQTag (K)">AccQTag (K)</option>
          <option value="AccQTag (N-term)">AccQTag (N-term)</option>
          <option value="Acetyl (C)">Acetyl (C)</option>
          <option value="Acetyl (H)">Acetyl (H)</option>
          <option value="Acetyl (K)">Acetyl (K)</option>
          <option value="Acetyl (N-term)">Acetyl (N-term)</option>
          <option value="Acetyl (S)">Acetyl (S)</option>
          <option value="Acetyl (T)">Acetyl (T)</option>
          <option value="Acetyl (Y)">Acetyl (Y)</option>
          <option value="Acetyl:13C(2) (K)">Acetyl:13C(2) (K)</option>
          <option value="Acetyl:2H(3) (H)">Acetyl:2H(3) (H)</option>
          <option value="Acetyl:2H(3) (K)">Acetyl:2H(3) (K)</option>
          <option value="Acetyl:2H(3) (N-term)">Acetyl:2H(3) (N-term)</option>
          <option value="Acetyl:2H(3) (S)">Acetyl:2H(3) (S)</option>
          <option value="Acetyl:2H(3) (T)">Acetyl:2H(3) (T)</option>
          <option value="Acetyl:2H(3) (Y)">Acetyl:2H(3) (Y)</option>
          <option value="Acetyldeoxyhypusine (K)">Acetyldeoxyhypusine (K)</option>
          <option value="Acetylhypusine (K)">Acetylhypusine (K)</option>
          <option value="Ahx2+Hsl (C-term)">Ahx2+Hsl (C-term)</option>
          <option value="Ala-&gt;Arg (A)">Ala-&gt;Arg (A)</option>
          <option value="Ala-&gt;Asn (A)">Ala-&gt;Asn (A)</option>
          <option value="Ala-&gt;Asp (A)">Ala-&gt;Asp (A)</option>
          <option value="Ala-&gt;Cys (A)">Ala-&gt;Cys (A)</option>
          <option value="Ala-&gt;Gln (A)">Ala-&gt;Gln (A)</option>
          <option value="Ala-&gt;Glu (A)">Ala-&gt;Glu (A)</option>
          <option value="Ala-&gt;Gly (A)">Ala-&gt;Gly (A)</option>
          <option value="Ala-&gt;His (A)">Ala-&gt;His (A)</option>
          <option value="Ala-&gt;Lys (A)">Ala-&gt;Lys (A)</option>
          <option value="Ala-&gt;Met (A)">Ala-&gt;Met (A)</option>
          <option value="Ala-&gt;Phe (A)">Ala-&gt;Phe (A)</option>
          <option value="Ala-&gt;Pro (A)">Ala-&gt;Pro (A)</option>
          <option value="Ala-&gt;Ser (A)">Ala-&gt;Ser (A)</option>
          <option value="Ala-&gt;Thr (A)">Ala-&gt;Thr (A)</option>
          <option value="Ala-&gt;Trp (A)">Ala-&gt;Trp (A)</option>
          <option value="Ala-&gt;Tyr (A)">Ala-&gt;Tyr (A)</option>
          <option value="Ala-&gt;Val (A)">Ala-&gt;Val (A)</option>
          <option value="Ala-&gt;Xle (A)">Ala-&gt;Xle (A)</option>
          <option value="Amidated (C-term)">Amidated (C-term)</option>
          <option value="Amidine (K)">Amidine (K)</option>
          <option value="Amidine (N-term)">Amidine (N-term)</option>
          <option value="Amidino (C)">Amidino (C)</option>
          <option value="Amino (Y)">Amino (Y)</option>
          <option value="Ammonia-loss (N)">Ammonia-loss (N)</option>
          <option value="Ammonia-loss (N-term C)">Ammonia-loss (N-term C)</option>
          <option value="Ammonium (C-term)">Ammonium (C-term)</option>
          <option value="Ammonium (D)">Ammonium (D)</option>
          <option value="Ammonium (E)">Ammonium (E)</option>
          <option value="Archaeol (C)">Archaeol (C)</option>
          <option value="Arg (N-term)">Arg (N-term)</option>
          <option value="Arg-&gt;Ala (R)">Arg-&gt;Ala (R)</option>
          <option value="Arg-&gt;Asn (R)">Arg-&gt;Asn (R)</option>
          <option value="Arg-&gt;Asp (R)">Arg-&gt;Asp (R)</option>
          <option value="Arg-&gt;Cys (R)">Arg-&gt;Cys (R)</option>
          <option value="Arg-&gt;Gln (R)">Arg-&gt;Gln (R)</option>
          <option value="Arg-&gt;Glu (R)">Arg-&gt;Glu (R)</option>
          <option value="Arg-&gt;GluSA (R)">Arg-&gt;GluSA (R)</option>
          <option value="Arg-&gt;Gly (R)">Arg-&gt;Gly (R)</option>
          <option value="Arg-&gt;His (R)">Arg-&gt;His (R)</option>
          <option value="Arg-&gt;Lys (R)">Arg-&gt;Lys (R)</option>
          <option value="Arg-&gt;Met (R)">Arg-&gt;Met (R)</option>
          <option value="Arg-&gt;Npo (R)">Arg-&gt;Npo (R)</option>
          <option value="Arg-&gt;Orn (R)">Arg-&gt;Orn (R)</option>
          <option value="Arg-&gt;Phe (R)">Arg-&gt;Phe (R)</option>
          <option value="Arg-&gt;Pro (R)">Arg-&gt;Pro (R)</option>
          <option value="Arg-&gt;Ser (R)">Arg-&gt;Ser (R)</option>
          <option value="Arg-&gt;Thr (R)">Arg-&gt;Thr (R)</option>
          <option value="Arg-&gt;Trp (R)">Arg-&gt;Trp (R)</option>
          <option value="Arg-&gt;Tyr (R)">Arg-&gt;Tyr (R)</option>
          <option value="Arg-&gt;Val (R)">Arg-&gt;Val (R)</option>
          <option value="Arg-&gt;Xle (R)">Arg-&gt;Xle (R)</option>
          <option value="Arg-loss (C-term R)">Arg-loss (C-term R)</option>
          <option value="Arg2PG (R)">Arg2PG (R)</option>
          <option value="Argbiotinhydrazide (R)">Argbiotinhydrazide (R)</option>
          <option value="Asn-&gt;Ala (N)">Asn-&gt;Ala (N)</option>
          <option value="Asn-&gt;Arg (N)">Asn-&gt;Arg (N)</option>
          <option value="Asn-&gt;Asp (N)">Asn-&gt;Asp (N)</option>
          <option value="Asn-&gt;Cys (N)">Asn-&gt;Cys (N)</option>
          <option value="Asn-&gt;Gln (N)">Asn-&gt;Gln (N)</option>
          <option value="Asn-&gt;Glu (N)">Asn-&gt;Glu (N)</option>
          <option value="Asn-&gt;Gly (N)">Asn-&gt;Gly (N)</option>
          <option value="Asn-&gt;His (N)">Asn-&gt;His (N)</option>
          <option value="Asn-&gt;Lys (N)">Asn-&gt;Lys (N)</option>
          <option value="Asn-&gt;Met (N)">Asn-&gt;Met (N)</option>
          <option value="Asn-&gt;Phe (N)">Asn-&gt;Phe (N)</option>
          <option value="Asn-&gt;Pro (N)">Asn-&gt;Pro (N)</option>
          <option value="Asn-&gt;Ser (N)">Asn-&gt;Ser (N)</option>
          <option value="Asn-&gt;Thr (N)">Asn-&gt;Thr (N)</option>
          <option value="Asn-&gt;Trp (N)">Asn-&gt;Trp (N)</option>
          <option value="Asn-&gt;Tyr (N)">Asn-&gt;Tyr (N)</option>
          <option value="Asn-&gt;Val (N)">Asn-&gt;Val (N)</option>
          <option value="Asn-&gt;Xle (N)">Asn-&gt;Xle (N)</option>
          <option value="Asp-&gt;Ala (D)">Asp-&gt;Ala (D)</option>
          <option value="Asp-&gt;Arg (D)">Asp-&gt;Arg (D)</option>
          <option value="Asp-&gt;Asn (D)">Asp-&gt;Asn (D)</option>
          <option value="Asp-&gt;Cys (D)">Asp-&gt;Cys (D)</option>
          <option value="Asp-&gt;Gln (D)">Asp-&gt;Gln (D)</option>
          <option value="Asp-&gt;Glu (D)">Asp-&gt;Glu (D)</option>
          <option value="Asp-&gt;Gly (D)">Asp-&gt;Gly (D)</option>
          <option value="Asp-&gt;His (D)">Asp-&gt;His (D)</option>
          <option value="Asp-&gt;Lys (D)">Asp-&gt;Lys (D)</option>
          <option value="Asp-&gt;Met (D)">Asp-&gt;Met (D)</option>
          <option value="Asp-&gt;Phe (D)">Asp-&gt;Phe (D)</option>
          <option value="Asp-&gt;Pro (D)">Asp-&gt;Pro (D)</option>
          <option value="Asp-&gt;Ser (D)">Asp-&gt;Ser (D)</option>
          <option value="Asp-&gt;Thr (D)">Asp-&gt;Thr (D)</option>
          <option value="Asp-&gt;Trp (D)">Asp-&gt;Trp (D)</option>
          <option value="Asp-&gt;Tyr (D)">Asp-&gt;Tyr (D)</option>
          <option value="Asp-&gt;Val (D)">Asp-&gt;Val (D)</option>
          <option value="Asp-&gt;Xle (D)">Asp-&gt;Xle (D)</option>
          <option value="Atto495Maleimide (C)">Atto495Maleimide (C)</option>
          <option value="BADGE (C)">BADGE (C)</option>
          <option value="BDMAPP (H)">BDMAPP (H)</option>
          <option value="BDMAPP (K)">BDMAPP (K)</option>
          <option value="BDMAPP (W)">BDMAPP (W)</option>
          <option value="BDMAPP (Y)">BDMAPP (Y)</option>
          <option value="BHAc (K)">BHAc (K)</option>
          <option value="BHT (C)">BHT (C)</option>
          <option value="BHT (H)">BHT (H)</option>
          <option value="BHT (K)">BHT (K)</option>
          <option value="BHTOH (C)">BHTOH (C)</option>
          <option value="BHTOH (H)">BHTOH (H)</option>
          <option value="BHTOH (K)">BHTOH (K)</option>
          <option value="BITC (C)">BITC (C)</option>
          <option value="BITC (K)">BITC (K)</option>
          <option value="BITC (N-term)">BITC (N-term)</option>
          <option value="BMOE (C)">BMOE (C)</option>
          <option value="BMP-piperidinol (C)">BMP-piperidinol (C)</option>
          <option value="BMP-piperidinol (M)">BMP-piperidinol (M)</option>
          <option value="Bacillosamine (N)">Bacillosamine (N)</option>
          <option value="Benzoyl (K)">Benzoyl (K)</option>
          <option value="Benzoyl (N-term)">Benzoyl (N-term)</option>
          <option value="Biotin (K)">Biotin (K)</option>
          <option value="Biotin (N-term)">Biotin (N-term)</option>
          <option value="Biotin-HPDP (C)">Biotin-HPDP (C)</option>
          <option value="Biotin-PEG-PRA (M)">Biotin-PEG-PRA (M)</option>
          <option value="Biotin-PEO-Amine (D)">Biotin-PEO-Amine (D)</option>
          <option value="Biotin-PEO-Amine (E)">Biotin-PEO-Amine (E)</option>
          <option value="Biotin-phenacyl (C)">Biotin-phenacyl (C)</option>
          <option value="Biotin-phenacyl (H)">Biotin-phenacyl (H)</option>
          <option value="Biotin-phenacyl (S)">Biotin-phenacyl (S)</option>
          <option value="Biotin:Cayman-10013 (C)">Biotin:Cayman-10013 (C)</option>
          <option value="Biotin:Cayman-10141 (C)">Biotin:Cayman-10141 (C)</option>
          <option value="Biotin:Invitrogen-M1602 (C)">Biotin:Invitrogen-M1602 (C)</option>
          <option value="Biotin:Sigma-B1267 (C)">Biotin:Sigma-B1267 (C)</option>
          <option value="Biotin:Thermo-21325 (K)">Biotin:Thermo-21325 (K)</option>
          <option value="Biotin:Thermo-21345 (Q)">Biotin:Thermo-21345 (Q)</option>
          <option value="Biotin:Thermo-21360 (C-term)">Biotin:Thermo-21360 (C-term)</option>
          <option value="Biotin:Thermo-21901+2H2O (C)">Biotin:Thermo-21901+2H2O (C)</option>
          <option value="Biotin:Thermo-21901+H2O (C)">Biotin:Thermo-21901+H2O (C)</option>
          <option value="Biotin:Thermo-21911 (C)">Biotin:Thermo-21911 (C)</option>
          <option value="Biotin:Thermo-33033 (N-term)">Biotin:Thermo-33033 (N-term)</option>
          <option value="Biotin:Thermo-33033-H (N-term)">Biotin:Thermo-33033-H (N-term)</option>
          <option value="Biotin:Thermo-88310 (K)">Biotin:Thermo-88310 (K)</option>
          <option value="Biotin:Thermo-88317 (S)">Biotin:Thermo-88317 (S)</option>
          <option value="Biotin:Thermo-88317 (Y)">Biotin:Thermo-88317 (Y)</option>
          <option value="BisANS (K)">BisANS (K)</option>
          <option value="Bodipy (C)">Bodipy (C)</option>
          <option value="Bromo (F)">Bromo (F)</option>
          <option value="Bromo (H)">Bromo (H)</option>
          <option value="Bromo (W)">Bromo (W)</option>
          <option value="Bromo (Y)">Bromo (Y)</option>
          <option value="Bromobimane (C)">Bromobimane (C)</option>
          <option value="Butyryl (K)">Butyryl (K)</option>
          <option value="C8-QAT (K)">C8-QAT (K)</option>
          <option value="C8-QAT (N-term)">C8-QAT (N-term)</option>
          <option value="CAF (N-term)">CAF (N-term)</option>
          <option value="CAMthiopropanoyl (K)">CAMthiopropanoyl (K)</option>
          <option value="CHDH (D)">CHDH (D)</option>
          <option value="CLIP_TRAQ_2 (K)">CLIP_TRAQ_2 (K)</option>
          <option value="CLIP_TRAQ_2 (N-term)">CLIP_TRAQ_2 (N-term)</option>
          <option value="CLIP_TRAQ_2 (Y)">CLIP_TRAQ_2 (Y)</option>
          <option value="CLIP_TRAQ_3 (K)">CLIP_TRAQ_3 (K)</option>
          <option value="CLIP_TRAQ_3 (N-term)">CLIP_TRAQ_3 (N-term)</option>
          <option value="CLIP_TRAQ_3 (Y)">CLIP_TRAQ_3 (Y)</option>
          <option value="CLIP_TRAQ_4 (K)">CLIP_TRAQ_4 (K)</option>
          <option value="CLIP_TRAQ_4 (N-term)">CLIP_TRAQ_4 (N-term)</option>
          <option value="CLIP_TRAQ_4 (Y)">CLIP_TRAQ_4 (Y)</option>
          <option value="Can-FP-biotin (S)">Can-FP-biotin (S)</option>
          <option value="Can-FP-biotin (T)">Can-FP-biotin (T)</option>
          <option value="Can-FP-biotin (Y)">Can-FP-biotin (Y)</option>
          <option value="Carbamidomethyl (C)">Carbamidomethyl (C)</option>
          <option value="Carbamidomethyl (D)">Carbamidomethyl (D)</option>
          <option value="Carbamidomethyl (E)">Carbamidomethyl (E)</option>
          <option value="Carbamidomethyl (H)">Carbamidomethyl (H)</option>
          <option value="Carbamidomethyl (K)">Carbamidomethyl (K)</option>
          <option value="Carbamidomethyl (N-term)">Carbamidomethyl (N-term)</option>
          <option value="Carbamidomethyl (S)">Carbamidomethyl (S)</option>
          <option value="Carbamidomethyl (T)">Carbamidomethyl (T)</option>
          <option value="Carbamidomethyl (Y)">Carbamidomethyl (Y)</option>
          <option value="CarbamidomethylDTT (C)">CarbamidomethylDTT (C)</option>
          <option value="Carbamyl (C)">Carbamyl (C)</option>
          <option value="Carbamyl (K)">Carbamyl (K)</option>
          <option value="Carbamyl (M)">Carbamyl (M)</option>
          <option value="Carbamyl (N-term)">Carbamyl (N-term)</option>
          <option value="Carbamyl (R)">Carbamyl (R)</option>
          <option value="Carbamyl (S)">Carbamyl (S)</option>
          <option value="Carbamyl (T)">Carbamyl (T)</option>
          <option value="Carbamyl (Y)">Carbamyl (Y)</option>
          <option value="Carbofuran (S)">Carbofuran (S)</option>
          <option value="Carboxy (D)">Carboxy (D)</option>
          <option value="Carboxy (E)">Carboxy (E)</option>
          <option value="Carboxy (K)">Carboxy (K)</option>
          <option value="Carboxy (W)">Carboxy (W)</option>
          <option value="Carboxyethyl (H)">Carboxyethyl (H)</option>
          <option value="Carboxyethyl (K)">Carboxyethyl (K)</option>
          <option value="Carboxymethyl (C)">Carboxymethyl (C)</option>
          <option value="Carboxymethyl (K)">Carboxymethyl (K)</option>
          <option value="Carboxymethyl (N-term)">Carboxymethyl (N-term)</option>
          <option value="Carboxymethyl (W)">Carboxymethyl (W)</option>
          <option value="Carboxymethyl:13C(2) (C)">Carboxymethyl:13C(2) (C)</option>
          <option value="CarboxymethylDMAP (N-term)">CarboxymethylDMAP (N-term)</option>
          <option value="CarboxymethylDTT (C)">CarboxymethylDTT (C)</option>
          <option value="Cation:Ag (C-term)">Cation:Ag (C-term)</option>
          <option value="Cation:Ag (D)">Cation:Ag (D)</option>
          <option value="Cation:Ag (E)">Cation:Ag (E)</option>
          <option value="Cation:Ca[II] (C-term)">Cation:Ca[II] (C-term)</option>
          <option value="Cation:Ca[II] (D)">Cation:Ca[II] (D)</option>
          <option value="Cation:Ca[II] (E)">Cation:Ca[II] (E)</option>
          <option value="Cation:Cu[I] (C-term)">Cation:Cu[I] (C-term)</option>
          <option value="Cation:Cu[I] (D)">Cation:Cu[I] (D)</option>
          <option value="Cation:Cu[I] (E)">Cation:Cu[I] (E)</option>
          <option value="Cation:Fe[II] (C-term)">Cation:Fe[II] (C-term)</option>
          <option value="Cation:Fe[II] (D)">Cation:Fe[II] (D)</option>
          <option value="Cation:Fe[II] (E)">Cation:Fe[II] (E)</option>
          <option value="Cation:K (C-term)">Cation:K (C-term)</option>
          <option value="Cation:K (D)">Cation:K (D)</option>
          <option value="Cation:K (E)">Cation:K (E)</option>
          <option value="Cation:Li (C-term)">Cation:Li (C-term)</option>
          <option value="Cation:Li (D)">Cation:Li (D)</option>
          <option value="Cation:Li (E)">Cation:Li (E)</option>
          <option value="Cation:Mg[II] (C-term)">Cation:Mg[II] (C-term)</option>
          <option value="Cation:Mg[II] (D)">Cation:Mg[II] (D)</option>
          <option value="Cation:Mg[II] (E)">Cation:Mg[II] (E)</option>
          <option value="Cation:Na (C-term)">Cation:Na (C-term)</option>
          <option value="Cation:Na (D)">Cation:Na (D)</option>
          <option value="Cation:Na (E)">Cation:Na (E)</option>
          <option value="Cation:Ni[II] (C-term)">Cation:Ni[II] (C-term)</option>
          <option value="Cation:Ni[II] (D)">Cation:Ni[II] (D)</option>
          <option value="Cation:Ni[II] (E)">Cation:Ni[II] (E)</option>
          <option value="Cation:Zn[II] (C-term)">Cation:Zn[II] (C-term)</option>
          <option value="Cation:Zn[II] (D)">Cation:Zn[II] (D)</option>
          <option value="Cation:Zn[II] (E)">Cation:Zn[II] (E)</option>
          <option value="Chlorination (Y)">Chlorination (Y)</option>
          <option value="Chlorpyrifos (S)">Chlorpyrifos (S)</option>
          <option value="Chlorpyrifos (T)">Chlorpyrifos (T)</option>
          <option value="Chlorpyrifos (Y)">Chlorpyrifos (Y)</option>
          <option value="CoenzymeA (C)">CoenzymeA (C)</option>
          <option value="CresylSaligeninPhosphate (H)">CresylSaligeninPhosphate (H)</option>
          <option value="CresylSaligeninPhosphate (K)">CresylSaligeninPhosphate (K)</option>
          <option value="CresylSaligeninPhosphate (R)">CresylSaligeninPhosphate (R)</option>
          <option value="CresylSaligeninPhosphate (S)">CresylSaligeninPhosphate (S)</option>
          <option value="CresylSaligeninPhosphate (T)">CresylSaligeninPhosphate (T)</option>
          <option value="CresylSaligeninPhosphate (Y)">CresylSaligeninPhosphate (Y)</option>
          <option value="Cresylphosphate (H)">Cresylphosphate (H)</option>
          <option value="Cresylphosphate (K)">Cresylphosphate (K)</option>
          <option value="Cresylphosphate (R)">Cresylphosphate (R)</option>
          <option value="Cresylphosphate (S)">Cresylphosphate (S)</option>
          <option value="Cresylphosphate (T)">Cresylphosphate (T)</option>
          <option value="Cresylphosphate (Y)">Cresylphosphate (Y)</option>
          <option value="Crotonaldehyde (C)">Crotonaldehyde (C)</option>
          <option value="Crotonaldehyde (H)">Crotonaldehyde (H)</option>
          <option value="Crotonaldehyde (K)">Crotonaldehyde (K)</option>
          <option value="Crotonyl (K)">Crotonyl (K)</option>
          <option value="CuSMo (C)">CuSMo (C)</option>
          <option value="Cy3-maleimide (C)">Cy3-maleimide (C)</option>
          <option value="Cy3b-maleimide (C)">Cy3b-maleimide (C)</option>
          <option value="CyDye-Cy3 (C)">CyDye-Cy3 (C)</option>
          <option value="CyDye-Cy5 (C)">CyDye-Cy5 (C)</option>
          <option value="Cyano (C)">Cyano (C)</option>
          <option value="Cys-&gt;Ala (C)">Cys-&gt;Ala (C)</option>
          <option value="Cys-&gt;Arg (C)">Cys-&gt;Arg (C)</option>
          <option value="Cys-&gt;Asn (C)">Cys-&gt;Asn (C)</option>
          <option value="Cys-&gt;Asp (C)">Cys-&gt;Asp (C)</option>
          <option value="Cys-&gt;Dha (C)">Cys-&gt;Dha (C)</option>
          <option value="Cys-&gt;Gln (C)">Cys-&gt;Gln (C)</option>
          <option value="Cys-&gt;Glu (C)">Cys-&gt;Glu (C)</option>
          <option value="Cys-&gt;Gly (C)">Cys-&gt;Gly (C)</option>
          <option value="Cys-&gt;His (C)">Cys-&gt;His (C)</option>
          <option value="Cys-&gt;Lys (C)">Cys-&gt;Lys (C)</option>
          <option value="Cys-&gt;Met (C)">Cys-&gt;Met (C)</option>
          <option value="Cys-&gt;Oxoalanine (C)">Cys-&gt;Oxoalanine (C)</option>
          <option value="Cys-&gt;Phe (C)">Cys-&gt;Phe (C)</option>
          <option value="Cys-&gt;Pro (C)">Cys-&gt;Pro (C)</option>
          <option value="Cys-&gt;Ser (C)">Cys-&gt;Ser (C)</option>
          <option value="Cys-&gt;Thr (C)">Cys-&gt;Thr (C)</option>
          <option value="Cys-&gt;Trp (C)">Cys-&gt;Trp (C)</option>
          <option value="Cys-&gt;Tyr (C)">Cys-&gt;Tyr (C)</option>
          <option value="Cys-&gt;Val (C)">Cys-&gt;Val (C)</option>
          <option value="Cys-&gt;Xle (C)">Cys-&gt;Xle (C)</option>
          <option value="Cys-&gt;ethylaminoAla (C)">Cys-&gt;ethylaminoAla (C)</option>
          <option value="Cys-&gt;methylaminoAla (C)">Cys-&gt;methylaminoAla (C)</option>
          <option value="Cysteinyl (C)">Cysteinyl (C)</option>
          <option value="Cytopiloyne (C)">Cytopiloyne (C)</option>
          <option value="Cytopiloyne (K)">Cytopiloyne (K)</option>
          <option value="Cytopiloyne (N-term)">Cytopiloyne (N-term)</option>
          <option value="Cytopiloyne (P)">Cytopiloyne (P)</option>
          <option value="Cytopiloyne (R)">Cytopiloyne (R)</option>
          <option value="Cytopiloyne (S)">Cytopiloyne (S)</option>
          <option value="Cytopiloyne (Y)">Cytopiloyne (Y)</option>
          <option value="Cytopiloyne+water (C)">Cytopiloyne+water (C)</option>
          <option value="Cytopiloyne+water (K)">Cytopiloyne+water (K)</option>
          <option value="Cytopiloyne+water (N-term)">Cytopiloyne+water (N-term)</option>
          <option value="Cytopiloyne+water (R)">Cytopiloyne+water (R)</option>
          <option value="Cytopiloyne+water (S)">Cytopiloyne+water (S)</option>
          <option value="Cytopiloyne+water (T)">Cytopiloyne+water (T)</option>
          <option value="Cytopiloyne+water (Y)">Cytopiloyne+water (Y)</option>
          <option value="DAET (S)">DAET (S)</option>
          <option value="DAET (T)">DAET (T)</option>
          <option value="DEDGFLYMVYASQETFG (K)">DEDGFLYMVYASQETFG (K)</option>
          <option value="DFDNB (K)">DFDNB (K)</option>
          <option value="DFDNB (N)">DFDNB (N)</option>
          <option value="DFDNB (Q)">DFDNB (Q)</option>
          <option value="DFDNB (R)">DFDNB (R)</option>
          <option value="DHP (C)">DHP (C)</option>
          <option value="DMPO (C)">DMPO (C)</option>
          <option value="DMPO (H)">DMPO (H)</option>
          <option value="DMPO (Y)">DMPO (Y)</option>
          <option value="DNCB_hapten (C)">DNCB_hapten (C)</option>
          <option value="DNCB_hapten (H)">DNCB_hapten (H)</option>
          <option value="DNCB_hapten (K)">DNCB_hapten (K)</option>
          <option value="DNCB_hapten (Y)">DNCB_hapten (Y)</option>
          <option value="DNPS (C)">DNPS (C)</option>
          <option value="DNPS (W)">DNPS (W)</option>
          <option value="DTBP (K)">DTBP (K)</option>
          <option value="DTBP (N)">DTBP (N)</option>
          <option value="DTBP (Q)">DTBP (Q)</option>
          <option value="DTBP (R)">DTBP (R)</option>
          <option value="DTT_C (C)">DTT_C (C)</option>
          <option value="DTT_C:2H(6) (C)">DTT_C:2H(6) (C)</option>
          <option value="DTT_ST (S)">DTT_ST (S)</option>
          <option value="DTT_ST (T)">DTT_ST (T)</option>
          <option value="DTT_ST:2H(6) (S)">DTT_ST:2H(6) (S)</option>
          <option value="DTT_ST:2H(6) (T)">DTT_ST:2H(6) (T)</option>
          <option value="Dansyl (K)">Dansyl (K)</option>
          <option value="Dansyl (N-term)">Dansyl (N-term)</option>
          <option value="Dap-DSP (A)">Dap-DSP (A)</option>
          <option value="Dap-DSP (E)">Dap-DSP (E)</option>
          <option value="Dap-DSP (K)">Dap-DSP (K)</option>
          <option value="DeStreak (C)">DeStreak (C)</option>
          <option value="Deamidated (N)">Deamidated (N)</option>
          <option value="Deamidated (Q)">Deamidated (Q)</option>
          <option value="Deamidated (R)">Deamidated (R)</option>
          <option value="Deamidated:18O(1) (N)">Deamidated:18O(1) (N)</option>
          <option value="Deamidated:18O(1) (Q)">Deamidated:18O(1) (Q)</option>
          <option value="Decanoyl (S)">Decanoyl (S)</option>
          <option value="Decanoyl (T)">Decanoyl (T)</option>
          <option value="Dehydrated (D)">Dehydrated (D)</option>
          <option value="Dehydrated (N-term C)">Dehydrated (N-term C)</option>
          <option value="Dehydrated (S)">Dehydrated (S)</option>
          <option value="Dehydrated (T)">Dehydrated (T)</option>
          <option value="Dehydrated (Y)">Dehydrated (Y)</option>
          <option value="Dehydro (C)">Dehydro (C)</option>
          <option value="Delta:H(1)N(-1)18O(1) (N)">Delta:H(1)N(-1)18O(1) (N)</option>
          <option value="Delta:H(2)C(2) (H)">Delta:H(2)C(2) (H)</option>
          <option value="Delta:H(2)C(2) (K)">Delta:H(2)C(2) (K)</option>
          <option value="Delta:H(2)C(2) (N-term)">Delta:H(2)C(2) (N-term)</option>
          <option value="Delta:H(2)C(3) (K)">Delta:H(2)C(3) (K)</option>
          <option value="Delta:H(2)C(3)O(1) (K)">Delta:H(2)C(3)O(1) (K)</option>
          <option value="Delta:H(2)C(3)O(1) (R)">Delta:H(2)C(3)O(1) (R)</option>
          <option value="Delta:H(2)C(5) (K)">Delta:H(2)C(5) (K)</option>
          <option value="Delta:H(4)C(2) (H)">Delta:H(4)C(2) (H)</option>
          <option value="Delta:H(4)C(2) (K)">Delta:H(4)C(2) (K)</option>
          <option value="Delta:H(4)C(2) (N-term)">Delta:H(4)C(2) (N-term)</option>
          <option value="Delta:H(4)C(2)O(-1)S(1) (S)">Delta:H(4)C(2)O(-1)S(1) (S)</option>
          <option value="Delta:H(4)C(3) (H)">Delta:H(4)C(3) (H)</option>
          <option value="Delta:H(4)C(3) (K)">Delta:H(4)C(3) (K)</option>
          <option value="Delta:H(4)C(3)O(1) (C)">Delta:H(4)C(3)O(1) (C)</option>
          <option value="Delta:H(4)C(3)O(1) (H)">Delta:H(4)C(3)O(1) (H)</option>
          <option value="Delta:H(4)C(3)O(1) (K)">Delta:H(4)C(3)O(1) (K)</option>
          <option value="Delta:H(4)C(6) (K)">Delta:H(4)C(6) (K)</option>
          <option value="Delta:H(5)C(2) (P)">Delta:H(5)C(2) (P)</option>
          <option value="Delta:H(6)C(3)O(1) (C)">Delta:H(6)C(3)O(1) (C)</option>
          <option value="Delta:H(6)C(3)O(1) (H)">Delta:H(6)C(3)O(1) (H)</option>
          <option value="Delta:H(6)C(3)O(1) (K)">Delta:H(6)C(3)O(1) (K)</option>
          <option value="Delta:H(6)C(6)O(1) (K)">Delta:H(6)C(6)O(1) (K)</option>
          <option value="Delta:H(8)C(6)O(1) (L)">Delta:H(8)C(6)O(1) (L)</option>
          <option value="Delta:H(8)C(6)O(2) (K)">Delta:H(8)C(6)O(2) (K)</option>
          <option value="Delta:Hg(1) (C)">Delta:Hg(1) (C)</option>
          <option value="Delta:S(-1)Se(1) (C)">Delta:S(-1)Se(1) (C)</option>
          <option value="Delta:S(-1)Se(1) (M)">Delta:S(-1)Se(1) (M)</option>
          <option value="Delta:Se(1) (C)">Delta:Se(1) (C)</option>
          <option value="Deoxy (D)">Deoxy (D)</option>
          <option value="Deoxy (S)">Deoxy (S)</option>
          <option value="Deoxy (T)">Deoxy (T)</option>
          <option value="Deoxyhypusine (K)">Deoxyhypusine (K)</option>
          <option value="Dethiomethyl (M)">Dethiomethyl (M)</option>
          <option value="DiART6plex (K)">DiART6plex (K)</option>
          <option value="DiART6plex (N-term)">DiART6plex (N-term)</option>
          <option value="DiART6plex (Y)">DiART6plex (Y)</option>
          <option value="DiART6plex115 (K)">DiART6plex115 (K)</option>
          <option value="DiART6plex115 (N-term)">DiART6plex115 (N-term)</option>
          <option value="DiART6plex115 (Y)">DiART6plex115 (Y)</option>
          <option value="DiART6plex116/119 (K)">DiART6plex116/119 (K)</option>
          <option value="DiART6plex116/119 (N-term)">DiART6plex116/119 (N-term)</option>
          <option value="DiART6plex116/119 (Y)">DiART6plex116/119 (Y)</option>
          <option value="DiART6plex117 (K)">DiART6plex117 (K)</option>
          <option value="DiART6plex117 (N-term)">DiART6plex117 (N-term)</option>
          <option value="DiART6plex117 (Y)">DiART6plex117 (Y)</option>
          <option value="DiART6plex118 (K)">DiART6plex118 (K)</option>
          <option value="DiART6plex118 (N-term)">DiART6plex118 (N-term)</option>
          <option value="DiART6plex118 (Y)">DiART6plex118 (Y)</option>
          <option value="DiLeu4plex (K)">DiLeu4plex (K)</option>
          <option value="DiLeu4plex (N-term)">DiLeu4plex (N-term)</option>
          <option value="DiLeu4plex (Y)">DiLeu4plex (Y)</option>
          <option value="DiLeu4plex115 (K)">DiLeu4plex115 (K)</option>
          <option value="DiLeu4plex115 (N-term)">DiLeu4plex115 (N-term)</option>
          <option value="DiLeu4plex115 (Y)">DiLeu4plex115 (Y)</option>
          <option value="DiLeu4plex117 (K)">DiLeu4plex117 (K)</option>
          <option value="DiLeu4plex117 (N-term)">DiLeu4plex117 (N-term)</option>
          <option value="DiLeu4plex117 (Y)">DiLeu4plex117 (Y)</option>
          <option value="DiLeu4plex118 (K)">DiLeu4plex118 (K)</option>
          <option value="DiLeu4plex118 (N-term)">DiLeu4plex118 (N-term)</option>
          <option value="DiLeu4plex118 (Y)">DiLeu4plex118 (Y)</option>
          <option value="Diacylglycerol (C)">Diacylglycerol (C)</option>
          <option value="Dibromo (Y)">Dibromo (Y)</option>
          <option value="Dicarbamidomethyl (C)">Dicarbamidomethyl (C)</option>
          <option value="Dicarbamidomethyl (H)">Dicarbamidomethyl (H)</option>
          <option value="Dicarbamidomethyl (K)">Dicarbamidomethyl (K)</option>
          <option value="Dicarbamidomethyl (N-term)">Dicarbamidomethyl (N-term)</option>
          <option value="Dicarbamidomethyl (R)">Dicarbamidomethyl (R)</option>
          <option value="Didehydro (C-term K)">Didehydro (C-term K)</option>
          <option value="Didehydro (S)">Didehydro (S)</option>
          <option value="Didehydro (T)">Didehydro (T)</option>
          <option value="Didehydro (Y)">Didehydro (Y)</option>
          <option value="Didehydroretinylidene (K)">Didehydroretinylidene (K)</option>
          <option value="Diethyl (K)">Diethyl (K)</option>
          <option value="Diethyl (N-term)">Diethyl (N-term)</option>
          <option value="Diethylphosphate (C)">Diethylphosphate (C)</option>
          <option value="Diethylphosphate (H)">Diethylphosphate (H)</option>
          <option value="Diethylphosphate (K)">Diethylphosphate (K)</option>
          <option value="Diethylphosphate (N-term)">Diethylphosphate (N-term)</option>
          <option value="Diethylphosphate (S)">Diethylphosphate (S)</option>
          <option value="Diethylphosphate (T)">Diethylphosphate (T)</option>
          <option value="Diethylphosphate (Y)">Diethylphosphate (Y)</option>
          <option value="Difuran (Y)">Difuran (Y)</option>
          <option value="Dihydroxyimidazolidine (R)">Dihydroxyimidazolidine (R)</option>
          <option value="Diiodo (H)">Diiodo (H)</option>
          <option value="Diiodo (Y)">Diiodo (Y)</option>
          <option value="Diironsubcluster (C)">Diironsubcluster (C)</option>
          <option value="Diisopropylphosphate (K)">Diisopropylphosphate (K)</option>
          <option value="Diisopropylphosphate (N-term)">Diisopropylphosphate (N-term)</option>
          <option value="Diisopropylphosphate (S)">Diisopropylphosphate (S)</option>
          <option value="Diisopropylphosphate (T)">Diisopropylphosphate (T)</option>
          <option value="Diisopropylphosphate (Y)">Diisopropylphosphate (Y)</option>
          <option value="Dimethyl (K)">Dimethyl (K)</option>
          <option value="Dimethyl (N)">Dimethyl (N)</option>
          <option value="Dimethyl (N-term)">Dimethyl (N-term)</option>
          <option value="Dimethyl (R)">Dimethyl (R)</option>
          <option value="Dimethyl:2H(4) (K)">Dimethyl:2H(4) (K)</option>
          <option value="Dimethyl:2H(4) (N-term)">Dimethyl:2H(4) (N-term)</option>
          <option value="Dimethyl:2H(4)13C(2) (K)">Dimethyl:2H(4)13C(2) (K)</option>
          <option value="Dimethyl:2H(4)13C(2) (N-term)">Dimethyl:2H(4)13C(2) (N-term)</option>
          <option value="Dimethyl:2H(6) (K)">Dimethyl:2H(6) (K)</option>
          <option value="Dimethyl:2H(6) (N-term)">Dimethyl:2H(6) (N-term)</option>
          <option value="Dimethyl:2H(6) (R)">Dimethyl:2H(6) (R)</option>
          <option value="Dimethyl:2H(6)13C(2) (K)">Dimethyl:2H(6)13C(2) (K)</option>
          <option value="Dimethyl:2H(6)13C(2) (N-term)">Dimethyl:2H(6)13C(2) (N-term)</option>
          <option value="Dimethyl:2H(6)13C(2) (R)">Dimethyl:2H(6)13C(2) (R)</option>
          <option value="DimethylArsino (C)">DimethylArsino (C)</option>
          <option value="DimethylamineGMBS (C)">DimethylamineGMBS (C)</option>
          <option value="DimethylpyrroleAdduct (K)">DimethylpyrroleAdduct (K)</option>
          <option value="Dioxidation (C)">Dioxidation (C)</option>
          <option value="Dioxidation (F)">Dioxidation (F)</option>
          <option value="Dioxidation (K)">Dioxidation (K)</option>
          <option value="Dioxidation (M)">Dioxidation (M)</option>
          <option value="Dioxidation (P)">Dioxidation (P)</option>
          <option value="Dioxidation (R)">Dioxidation (R)</option>
          <option value="Dioxidation (W)">Dioxidation (W)</option>
          <option value="Dioxidation (Y)">Dioxidation (Y)</option>
          <option value="Diphthamide (H)">Diphthamide (H)</option>
          <option value="Dipyridyl (C)">Dipyridyl (C)</option>
          <option value="Dipyrrolylmethanemethyl (C)">Dipyrrolylmethanemethyl (C)</option>
          <option value="DyLight-maleimide (C)">DyLight-maleimide (C)</option>
          <option value="EDEDTIDVFQQQTGG (K)">EDEDTIDVFQQQTGG (K)</option>
          <option value="EDT-iodoacetyl-PEO-biotin (S)">EDT-iodoacetyl-PEO-biotin (S)</option>
          <option value="EDT-iodoacetyl-PEO-biotin (T)">EDT-iodoacetyl-PEO-biotin (T)</option>
          <option value="EDT-maleimide-PEO-biotin (S)">EDT-maleimide-PEO-biotin (S)</option>
          <option value="EDT-maleimide-PEO-biotin (T)">EDT-maleimide-PEO-biotin (T)</option>
          <option value="EEEDVIEVYQEQTGG (K)">EEEDVIEVYQEQTGG (K)</option>
          <option value="EGCG1 (C)">EGCG1 (C)</option>
          <option value="EGCG2 (C)">EGCG2 (C)</option>
          <option value="EHD-diphenylpentanone (C)">EHD-diphenylpentanone (C)</option>
          <option value="EHD-diphenylpentanone (M)">EHD-diphenylpentanone (M)</option>
          <option value="EQAT (C)">EQAT (C)</option>
          <option value="EQAT:2H(5) (C)">EQAT:2H(5) (C)</option>
          <option value="EQIGG (K)">EQIGG (K)</option>
          <option value="ESP (K)">ESP (K)</option>
          <option value="ESP (N-term)">ESP (N-term)</option>
          <option value="ESP:2H(10) (K)">ESP:2H(10) (K)</option>
          <option value="ESP:2H(10) (N-term)">ESP:2H(10) (N-term)</option>
          <option value="Ethanedithiol (S)">Ethanedithiol (S)</option>
          <option value="Ethanedithiol (T)">Ethanedithiol (T)</option>
          <option value="Ethanolamine (C)">Ethanolamine (C)</option>
          <option value="Ethanolamine (C-term)">Ethanolamine (C-term)</option>
          <option value="Ethanolamine (D)">Ethanolamine (D)</option>
          <option value="Ethanolamine (E)">Ethanolamine (E)</option>
          <option value="Ethanolyl (C)">Ethanolyl (C)</option>
          <option value="Ethanolyl (K)">Ethanolyl (K)</option>
          <option value="Ethanolyl (R)">Ethanolyl (R)</option>
          <option value="Ethoxyformyl (H)">Ethoxyformyl (H)</option>
          <option value="Ethyl (C-term)">Ethyl (C-term)</option>
          <option value="Ethyl (D)">Ethyl (D)</option>
          <option value="Ethyl (E)">Ethyl (E)</option>
          <option value="Ethyl (K)">Ethyl (K)</option>
          <option value="Ethyl (N-term)">Ethyl (N-term)</option>
          <option value="Ethyl+Deamidated (N)">Ethyl+Deamidated (N)</option>
          <option value="Ethyl+Deamidated (Q)">Ethyl+Deamidated (Q)</option>
          <option value="Ethylphosphate (K)">Ethylphosphate (K)</option>
          <option value="Ethylphosphate (N-term)">Ethylphosphate (N-term)</option>
          <option value="Ethylphosphate (S)">Ethylphosphate (S)</option>
          <option value="Ethylphosphate (T)">Ethylphosphate (T)</option>
          <option value="Ethylphosphate (Y)">Ethylphosphate (Y)</option>
          <option value="ExacTagAmine (K)">ExacTagAmine (K)</option>
          <option value="ExacTagThiol (C)">ExacTagThiol (C)</option>
          <option value="FAD (C)">FAD (C)</option>
          <option value="FAD (H)">FAD (H)</option>
          <option value="FAD (Y)">FAD (Y)</option>
          <option value="FMN (S)">FMN (S)</option>
          <option value="FMN (T)">FMN (T)</option>
          <option value="FMNC (C)">FMNC (C)</option>
          <option value="FMNH (C)">FMNH (C)</option>
          <option value="FMNH (H)">FMNH (H)</option>
          <option value="FNEM (C)">FNEM (C)</option>
          <option value="FP-Biotin (K)">FP-Biotin (K)</option>
          <option value="FP-Biotin (S)">FP-Biotin (S)</option>
          <option value="FP-Biotin (T)">FP-Biotin (T)</option>
          <option value="FP-Biotin (Y)">FP-Biotin (Y)</option>
          <option value="FTC (C)">FTC (C)</option>
          <option value="FTC (K)">FTC (K)</option>
          <option value="FTC (P)">FTC (P)</option>
          <option value="FTC (R)">FTC (R)</option>
          <option value="FTC (S)">FTC (S)</option>
          <option value="Farnesyl (C)">Farnesyl (C)</option>
          <option value="Fluorescein (C)">Fluorescein (C)</option>
          <option value="Fluoro (A)">Fluoro (A)</option>
          <option value="Fluoro (F)">Fluoro (F)</option>
          <option value="Fluoro (W)">Fluoro (W)</option>
          <option value="Fluoro (Y)">Fluoro (Y)</option>
          <option value="Formyl (K)">Formyl (K)</option>
          <option value="Formyl (N-term)">Formyl (N-term)</option>
          <option value="Formyl (S)">Formyl (S)</option>
          <option value="Formyl (T)">Formyl (T)</option>
          <option value="Furan (Y)">Furan (Y)</option>
          <option value="G-H1 (R)">G-H1 (R)</option>
          <option value="GG (C)">GG (C)</option>
          <option value="GG (K)">GG (K)</option>
          <option value="GG (S)">GG (S)</option>
          <option value="GG (T)">GG (T)</option>
          <option value="GGQ (K)">GGQ (K)</option>
          <option value="GIST-Quat (K)">GIST-Quat (K)</option>
          <option value="GIST-Quat (N-term)">GIST-Quat (N-term)</option>
          <option value="GIST-Quat:2H(3) (K)">GIST-Quat:2H(3) (K)</option>
          <option value="GIST-Quat:2H(3) (N-term)">GIST-Quat:2H(3) (N-term)</option>
          <option value="GIST-Quat:2H(6) (K)">GIST-Quat:2H(6) (K)</option>
          <option value="GIST-Quat:2H(6) (N-term)">GIST-Quat:2H(6) (N-term)</option>
          <option value="GIST-Quat:2H(9) (K)">GIST-Quat:2H(9) (K)</option>
          <option value="GIST-Quat:2H(9) (N-term)">GIST-Quat:2H(9) (N-term)</option>
          <option value="Galactosyl (K)">Galactosyl (K)</option>
          <option value="GeranylGeranyl (C)">GeranylGeranyl (C)</option>
          <option value="Gln-&gt;Ala (Q)">Gln-&gt;Ala (Q)</option>
          <option value="Gln-&gt;Arg (Q)">Gln-&gt;Arg (Q)</option>
          <option value="Gln-&gt;Asn (Q)">Gln-&gt;Asn (Q)</option>
          <option value="Gln-&gt;Asp (Q)">Gln-&gt;Asp (Q)</option>
          <option value="Gln-&gt;Cys (Q)">Gln-&gt;Cys (Q)</option>
          <option value="Gln-&gt;Glu (Q)">Gln-&gt;Glu (Q)</option>
          <option value="Gln-&gt;Gly (Q)">Gln-&gt;Gly (Q)</option>
          <option value="Gln-&gt;His (Q)">Gln-&gt;His (Q)</option>
          <option value="Gln-&gt;Lys (Q)">Gln-&gt;Lys (Q)</option>
          <option value="Gln-&gt;Met (Q)">Gln-&gt;Met (Q)</option>
          <option value="Gln-&gt;Phe (Q)">Gln-&gt;Phe (Q)</option>
          <option value="Gln-&gt;Pro (Q)">Gln-&gt;Pro (Q)</option>
          <option value="Gln-&gt;Ser (Q)">Gln-&gt;Ser (Q)</option>
          <option value="Gln-&gt;Thr (Q)">Gln-&gt;Thr (Q)</option>
          <option value="Gln-&gt;Trp (Q)">Gln-&gt;Trp (Q)</option>
          <option value="Gln-&gt;Tyr (Q)">Gln-&gt;Tyr (Q)</option>
          <option value="Gln-&gt;Val (Q)">Gln-&gt;Val (Q)</option>
          <option value="Gln-&gt;Xle (Q)">Gln-&gt;Xle (Q)</option>
          <option value="Gln-&gt;pyro-Glu (N-term Q)">Gln-&gt;pyro-Glu (N-term Q)</option>
          <option value="Glu (E)">Glu (E)</option>
          <option value="Glu-&gt;Ala (E)">Glu-&gt;Ala (E)</option>
          <option value="Glu-&gt;Arg (E)">Glu-&gt;Arg (E)</option>
          <option value="Glu-&gt;Asn (E)">Glu-&gt;Asn (E)</option>
          <option value="Glu-&gt;Asp (E)">Glu-&gt;Asp (E)</option>
          <option value="Glu-&gt;Cys (E)">Glu-&gt;Cys (E)</option>
          <option value="Glu-&gt;Gln (E)">Glu-&gt;Gln (E)</option>
          <option value="Glu-&gt;Gly (E)">Glu-&gt;Gly (E)</option>
          <option value="Glu-&gt;His (E)">Glu-&gt;His (E)</option>
          <option value="Glu-&gt;Lys (E)">Glu-&gt;Lys (E)</option>
          <option value="Glu-&gt;Met (E)">Glu-&gt;Met (E)</option>
          <option value="Glu-&gt;Phe (E)">Glu-&gt;Phe (E)</option>
          <option value="Glu-&gt;Pro (E)">Glu-&gt;Pro (E)</option>
          <option value="Glu-&gt;Ser (E)">Glu-&gt;Ser (E)</option>
          <option value="Glu-&gt;Thr (E)">Glu-&gt;Thr (E)</option>
          <option value="Glu-&gt;Trp (E)">Glu-&gt;Trp (E)</option>
          <option value="Glu-&gt;Tyr (E)">Glu-&gt;Tyr (E)</option>
          <option value="Glu-&gt;Val (E)">Glu-&gt;Val (E)</option>
          <option value="Glu-&gt;Xle (E)">Glu-&gt;Xle (E)</option>
          <option value="Glu-&gt;pyro-Glu (N-term E)">Glu-&gt;pyro-Glu (N-term E)</option>
          <option value="GluGlu (E)">GluGlu (E)</option>
          <option value="GluGluGlu (E)">GluGluGlu (E)</option>
          <option value="GluGluGluGlu (E)">GluGluGluGlu (E)</option>
          <option value="Gluconoylation (K)">Gluconoylation (K)</option>
          <option value="Gluconoylation (N-term)">Gluconoylation (N-term)</option>
          <option value="Glucosylgalactosyl (K)">Glucosylgalactosyl (K)</option>
          <option value="Glucuronyl (S)">Glucuronyl (S)</option>
          <option value="Glutathione (C)">Glutathione (C)</option>
          <option value="Gly (K)">Gly (K)</option>
          <option value="Gly (S)">Gly (S)</option>
          <option value="Gly (T)">Gly (T)</option>
          <option value="Gly-&gt;Ala (G)">Gly-&gt;Ala (G)</option>
          <option value="Gly-&gt;Arg (G)">Gly-&gt;Arg (G)</option>
          <option value="Gly-&gt;Asn (G)">Gly-&gt;Asn (G)</option>
          <option value="Gly-&gt;Asp (G)">Gly-&gt;Asp (G)</option>
          <option value="Gly-&gt;Cys (G)">Gly-&gt;Cys (G)</option>
          <option value="Gly-&gt;Gln (G)">Gly-&gt;Gln (G)</option>
          <option value="Gly-&gt;Glu (G)">Gly-&gt;Glu (G)</option>
          <option value="Gly-&gt;His (G)">Gly-&gt;His (G)</option>
          <option value="Gly-&gt;Lys (G)">Gly-&gt;Lys (G)</option>
          <option value="Gly-&gt;Met (G)">Gly-&gt;Met (G)</option>
          <option value="Gly-&gt;Phe (G)">Gly-&gt;Phe (G)</option>
          <option value="Gly-&gt;Pro (G)">Gly-&gt;Pro (G)</option>
          <option value="Gly-&gt;Ser (G)">Gly-&gt;Ser (G)</option>
          <option value="Gly-&gt;Thr (G)">Gly-&gt;Thr (G)</option>
          <option value="Gly-&gt;Trp (G)">Gly-&gt;Trp (G)</option>
          <option value="Gly-&gt;Tyr (G)">Gly-&gt;Tyr (G)</option>
          <option value="Gly-&gt;Val (G)">Gly-&gt;Val (G)</option>
          <option value="Gly-&gt;Xle (G)">Gly-&gt;Xle (G)</option>
          <option value="Gly-loss+Amide (C-term G)">Gly-loss+Amide (C-term G)</option>
          <option value="Glycerophospho (S)">Glycerophospho (S)</option>
          <option value="GlycerylPE (E)">GlycerylPE (E)</option>
          <option value="Glycosyl (P)">Glycosyl (P)</option>
          <option value="Guanidinyl (K)">Guanidinyl (K)</option>
          <option value="Guanidinyl (N-term)">Guanidinyl (N-term)</option>
          <option value="HCysThiolactone (K)">HCysThiolactone (K)</option>
          <option value="HCysteinyl (C)">HCysteinyl (C)</option>
          <option value="HMVK (C)">HMVK (C)</option>
          <option value="HN2_mustard (C)">HN2_mustard (C)</option>
          <option value="HN2_mustard (H)">HN2_mustard (H)</option>
          <option value="HN2_mustard (K)">HN2_mustard (K)</option>
          <option value="HN3_mustard (C)">HN3_mustard (C)</option>
          <option value="HN3_mustard (H)">HN3_mustard (H)</option>
          <option value="HN3_mustard (K)">HN3_mustard (K)</option>
          <option value="HNE (A)">HNE (A)</option>
          <option value="HNE (C)">HNE (C)</option>
          <option value="HNE (H)">HNE (H)</option>
          <option value="HNE (K)">HNE (K)</option>
          <option value="HNE (L)">HNE (L)</option>
          <option value="HNE+Delta:H(2) (C)">HNE+Delta:H(2) (C)</option>
          <option value="HNE+Delta:H(2) (H)">HNE+Delta:H(2) (H)</option>
          <option value="HNE+Delta:H(2) (K)">HNE+Delta:H(2) (K)</option>
          <option value="HNE-BAHAH (C)">HNE-BAHAH (C)</option>
          <option value="HNE-BAHAH (H)">HNE-BAHAH (H)</option>
          <option value="HNE-BAHAH (K)">HNE-BAHAH (K)</option>
          <option value="HNE-Delta:H(2)O (C)">HNE-Delta:H(2)O (C)</option>
          <option value="HNE-Delta:H(2)O (H)">HNE-Delta:H(2)O (H)</option>
          <option value="HNE-Delta:H(2)O (K)">HNE-Delta:H(2)O (K)</option>
          <option value="HPG (R)">HPG (R)</option>
          <option value="Heme (C)">Heme (C)</option>
          <option value="Heme (H)">Heme (H)</option>
          <option value="Hep (K)">Hep (K)</option>
          <option value="Hep (N)">Hep (N)</option>
          <option value="Hep (Q)">Hep (Q)</option>
          <option value="Hep (R)">Hep (R)</option>
          <option value="Hep (S)">Hep (S)</option>
          <option value="Hep (T)">Hep (T)</option>
          <option value="Hex (C)">Hex (C)</option>
          <option value="Hex (K)">Hex (K)</option>
          <option value="Hex (N)">Hex (N)</option>
          <option value="Hex (N-term)">Hex (N-term)</option>
          <option value="Hex (R)">Hex (R)</option>
          <option value="Hex (S)">Hex (S)</option>
          <option value="Hex (T)">Hex (T)</option>
          <option value="Hex (W)">Hex (W)</option>
          <option value="Hex (Y)">Hex (Y)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(1) (N)">Hex(1)HexNAc(1)NeuAc(1) (N)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(1) (S)">Hex(1)HexNAc(1)NeuAc(1) (S)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(1) (T)">Hex(1)HexNAc(1)NeuAc(1) (T)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(2) (N)">Hex(1)HexNAc(1)NeuAc(2) (N)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(2) (S)">Hex(1)HexNAc(1)NeuAc(2) (S)</option>
          <option value="Hex(1)HexNAc(1)NeuAc(2) (T)">Hex(1)HexNAc(1)NeuAc(2) (T)</option>
          <option value="Hex(1)HexNAc(1)dHex(1) (N)">Hex(1)HexNAc(1)dHex(1) (N)</option>
          <option value="Hex(1)HexNAc(2) (N)">Hex(1)HexNAc(2) (N)</option>
          <option value="Hex(1)HexNAc(2)Pent(1) (N)">Hex(1)HexNAc(2)Pent(1) (N)</option>
          <option value="Hex(1)HexNAc(2)dHex(1) (N)">Hex(1)HexNAc(2)dHex(1) (N)</option>
          <option value="Hex(1)HexNAc(2)dHex(1)Pent(1) (N)">Hex(1)HexNAc(2)dHex(1)Pent(1) (N)</option>
          <option value="Hex(1)HexNAc(2)dHex(2) (N)">Hex(1)HexNAc(2)dHex(2) (N)</option>
          <option value="Hex(2) (K)">Hex(2) (K)</option>
          <option value="Hex(2) (R)">Hex(2) (R)</option>
          <option value="Hex(2)HexNAc(2) (N)">Hex(2)HexNAc(2) (N)</option>
          <option value="Hex(2)HexNAc(2)Pent(1) (N)">Hex(2)HexNAc(2)Pent(1) (N)</option>
          <option value="Hex(2)HexNAc(2)dHex(1) (N)">Hex(2)HexNAc(2)dHex(1) (N)</option>
          <option value="Hex(3) (N)">Hex(3) (N)</option>
          <option value="Hex(3)HexNAc(1)Pent(1) (N)">Hex(3)HexNAc(1)Pent(1) (N)</option>
          <option value="Hex(3)HexNAc(2) (N)">Hex(3)HexNAc(2) (N)</option>
          <option value="Hex(3)HexNAc(2)P(1) (N)">Hex(3)HexNAc(2)P(1) (N)</option>
          <option value="Hex(3)HexNAc(4) (N)">Hex(3)HexNAc(4) (N)</option>
          <option value="Hex(4)HexNAc(4) (N)">Hex(4)HexNAc(4) (N)</option>
          <option value="Hex(5)HexNAc(2) (N)">Hex(5)HexNAc(2) (N)</option>
          <option value="Hex(5)HexNAc(4) (N)">Hex(5)HexNAc(4) (N)</option>
          <option value="Hex(5)HexNAc(4)NeuAc(1) (N)">Hex(5)HexNAc(4)NeuAc(1) (N)</option>
          <option value="Hex(5)HexNAc(4)NeuAc(2) (N)">Hex(5)HexNAc(4)NeuAc(2) (N)</option>
          <option value="Hex1HexNAc1 (N)">Hex1HexNAc1 (N)</option>
          <option value="Hex1HexNAc1 (S)">Hex1HexNAc1 (S)</option>
          <option value="Hex1HexNAc1 (T)">Hex1HexNAc1 (T)</option>
          <option value="HexN (K)">HexN (K)</option>
          <option value="HexN (N)">HexN (N)</option>
          <option value="HexN (T)">HexN (T)</option>
          <option value="HexN (W)">HexN (W)</option>
          <option value="HexNAc (N)">HexNAc (N)</option>
          <option value="HexNAc (S)">HexNAc (S)</option>
          <option value="HexNAc (T)">HexNAc (T)</option>
          <option value="HexNAc(1)dHex(1) (N)">HexNAc(1)dHex(1) (N)</option>
          <option value="HexNAc(1)dHex(2) (N)">HexNAc(1)dHex(2) (N)</option>
          <option value="HexNAc(2) (N)">HexNAc(2) (N)</option>
          <option value="HexNAc(2)dHex(1) (N)">HexNAc(2)dHex(1) (N)</option>
          <option value="HexNAc(2)dHex(2) (N)">HexNAc(2)dHex(2) (N)</option>
          <option value="His-&gt;Ala (H)">His-&gt;Ala (H)</option>
          <option value="His-&gt;Arg (H)">His-&gt;Arg (H)</option>
          <option value="His-&gt;Asn (H)">His-&gt;Asn (H)</option>
          <option value="His-&gt;Asp (H)">His-&gt;Asp (H)</option>
          <option value="His-&gt;Cys (H)">His-&gt;Cys (H)</option>
          <option value="His-&gt;Gln (H)">His-&gt;Gln (H)</option>
          <option value="His-&gt;Glu (H)">His-&gt;Glu (H)</option>
          <option value="His-&gt;Gly (H)">His-&gt;Gly (H)</option>
          <option value="His-&gt;Lys (H)">His-&gt;Lys (H)</option>
          <option value="His-&gt;Met (H)">His-&gt;Met (H)</option>
          <option value="His-&gt;Phe (H)">His-&gt;Phe (H)</option>
          <option value="His-&gt;Pro (H)">His-&gt;Pro (H)</option>
          <option value="His-&gt;Ser (H)">His-&gt;Ser (H)</option>
          <option value="His-&gt;Thr (H)">His-&gt;Thr (H)</option>
          <option value="His-&gt;Trp (H)">His-&gt;Trp (H)</option>
          <option value="His-&gt;Tyr (H)">His-&gt;Tyr (H)</option>
          <option value="His-&gt;Val (H)">His-&gt;Val (H)</option>
          <option value="His-&gt;Xle (H)">His-&gt;Xle (H)</option>
          <option value="Homocysteic_acid (M)">Homocysteic_acid (M)</option>
          <option value="Hydroxamic_acid (D)">Hydroxamic_acid (D)</option>
          <option value="Hydroxamic_acid (E)">Hydroxamic_acid (E)</option>
          <option value="Hydroxycinnamyl (C)">Hydroxycinnamyl (C)</option>
          <option value="Hydroxyfarnesyl (C)">Hydroxyfarnesyl (C)</option>
          <option value="Hydroxyheme (E)">Hydroxyheme (E)</option>
          <option value="Hydroxymethyl (N)">Hydroxymethyl (N)</option>
          <option value="HydroxymethylOP (K)">HydroxymethylOP (K)</option>
          <option value="Hydroxytrimethyl (K)">Hydroxytrimethyl (K)</option>
          <option value="Hypusine (K)">Hypusine (K)</option>
          <option value="IBTP (C)">IBTP (C)</option>
          <option value="ICAT-C (C)">ICAT-C (C)</option>
          <option value="ICAT-C:13C(9) (C)">ICAT-C:13C(9) (C)</option>
          <option value="ICAT-D (C)">ICAT-D (C)</option>
          <option value="ICAT-D:2H(8) (C)">ICAT-D:2H(8) (C)</option>
          <option value="ICAT-G (C)">ICAT-G (C)</option>
          <option value="ICAT-G:2H(8) (C)">ICAT-G:2H(8) (C)</option>
          <option value="ICAT-H (C)">ICAT-H (C)</option>
          <option value="ICAT-H:13C(6) (C)">ICAT-H:13C(6) (C)</option>
          <option value="ICDID (C)">ICDID (C)</option>
          <option value="ICDID:2H(6) (C)">ICDID:2H(6) (C)</option>
          <option value="ICPL (K)">ICPL (K)</option>
          <option value="ICPL (N-term)">ICPL (N-term)</option>
          <option value="ICPL:13C(6) (K)">ICPL:13C(6) (K)</option>
          <option value="ICPL:13C(6) (N-term)">ICPL:13C(6) (N-term)</option>
          <option value="ICPL:13C(6)2H(4) (K)">ICPL:13C(6)2H(4) (K)</option>
          <option value="ICPL:13C(6)2H(4) (N-term)">ICPL:13C(6)2H(4) (N-term)</option>
          <option value="ICPL:2H(4) (K)">ICPL:2H(4) (K)</option>
          <option value="ICPL:2H(4) (N-term)">ICPL:2H(4) (N-term)</option>
          <option value="IDEnT (C)">IDEnT (C)</option>
          <option value="IED-Biotin (C)">IED-Biotin (C)</option>
          <option value="IGBP (C)">IGBP (C)</option>
          <option value="IGBP:13C(2) (C)">IGBP:13C(2) (C)</option>
          <option value="IMEHex(2)NeuAc(1) (K)">IMEHex(2)NeuAc(1) (K)</option>
          <option value="IMID (K)">IMID (K)</option>
          <option value="IMID:2H(4) (K)">IMID:2H(4) (K)</option>
          <option value="ISD_z+2_ion (N-term)">ISD_z+2_ion (N-term)</option>
          <option value="Iminobiotin (K)">Iminobiotin (K)</option>
          <option value="Iminobiotin (N-term)">Iminobiotin (N-term)</option>
          <option value="Iodo (H)">Iodo (H)</option>
          <option value="Iodo (Y)">Iodo (Y)</option>
          <option value="IodoU-AMP (F)">IodoU-AMP (F)</option>
          <option value="IodoU-AMP (W)">IodoU-AMP (W)</option>
          <option value="IodoU-AMP (Y)">IodoU-AMP (Y)</option>
          <option value="Iodoacetanilide (C)">Iodoacetanilide (C)</option>
          <option value="Iodoacetanilide (K)">Iodoacetanilide (K)</option>
          <option value="Iodoacetanilide (N-term)">Iodoacetanilide (N-term)</option>
          <option value="Iodoacetanilide:13C(6) (C)">Iodoacetanilide:13C(6) (C)</option>
          <option value="Iodoacetanilide:13C(6) (K)">Iodoacetanilide:13C(6) (K)</option>
          <option value="Iodoacetanilide:13C(6) (N-term)">Iodoacetanilide:13C(6) (N-term)</option>
          <option value="Isopropylphospho (S)">Isopropylphospho (S)</option>
          <option value="Isopropylphospho (T)">Isopropylphospho (T)</option>
          <option value="Isopropylphospho (Y)">Isopropylphospho (Y)</option>
          <option value="LG-Hlactam-K (K)">LG-Hlactam-K (K)</option>
          <option value="LG-Hlactam-R (R)">LG-Hlactam-R (R)</option>
          <option value="LG-anhydrolactam (K)">LG-anhydrolactam (K)</option>
          <option value="LG-anhydrolactam (N-term)">LG-anhydrolactam (N-term)</option>
          <option value="LG-anhyropyrrole (K)">LG-anhyropyrrole (K)</option>
          <option value="LG-anhyropyrrole (N-term)">LG-anhyropyrrole (N-term)</option>
          <option value="LG-lactam-K (K)">LG-lactam-K (K)</option>
          <option value="LG-lactam-R (R)">LG-lactam-R (R)</option>
          <option value="LG-pyrrole (K)">LG-pyrrole (K)</option>
          <option value="LG-pyrrole (N-term)">LG-pyrrole (N-term)</option>
          <option value="LRGG (K)">LRGG (K)</option>
          <option value="Label:13C(1)2H(3) (M)">Label:13C(1)2H(3) (M)</option>
          <option value="Label:13C(1)2H(3)+Oxidation (M)">Label:13C(1)2H(3)+Oxidation (M)</option>
          <option value="Label:13C(3) (A)">Label:13C(3) (A)</option>
          <option value="Label:13C(3)15N(1) (A)">Label:13C(3)15N(1) (A)</option>
          <option value="Label:13C(4) (M)">Label:13C(4) (M)</option>
          <option value="Label:13C(4)+Oxidation (M)">Label:13C(4)+Oxidation (M)</option>
          <option value="Label:13C(4)15N(1) (D)">Label:13C(4)15N(1) (D)</option>
          <option value="Label:13C(4)15N(2)+GG (K)">Label:13C(4)15N(2)+GG (K)</option>
          <option value="Label:13C(5) (P)">Label:13C(5) (P)</option>
          <option value="Label:13C(5)15N(1) (E)">Label:13C(5)15N(1) (E)</option>
          <option value="Label:13C(5)15N(1) (M)">Label:13C(5)15N(1) (M)</option>
          <option value="Label:13C(5)15N(1) (P)">Label:13C(5)15N(1) (P)</option>
          <option value="Label:13C(5)15N(1) (V)">Label:13C(5)15N(1) (V)</option>
          <option value="Label:13C(6) (I)">Label:13C(6) (I)</option>
          <option value="Label:13C(6) (K)">Label:13C(6) (K)</option>
          <option value="Label:13C(6) (L)">Label:13C(6) (L)</option>
          <option value="Label:13C(6) (R)">Label:13C(6) (R)</option>
          <option value="Label:13C(6)+Acetyl (K)">Label:13C(6)+Acetyl (K)</option>
          <option value="Label:13C(6)+Dimethyl (K)">Label:13C(6)+Dimethyl (K)</option>
          <option value="Label:13C(6)+GG (K)">Label:13C(6)+GG (K)</option>
          <option value="Label:13C(6)15N(1) (I)">Label:13C(6)15N(1) (I)</option>
          <option value="Label:13C(6)15N(1) (L)">Label:13C(6)15N(1) (L)</option>
          <option value="Label:13C(6)15N(2) (K)">Label:13C(6)15N(2) (K)</option>
          <option value="Label:13C(6)15N(2)+Acetyl (K)">Label:13C(6)15N(2)+Acetyl (K)</option>
          <option value="Label:13C(6)15N(2)+Dimethyl (K)">Label:13C(6)15N(2)+Dimethyl (K)</option>
          <option value="Label:13C(6)15N(2)+GG (K)">Label:13C(6)15N(2)+GG (K)</option>
          <option value="Label:13C(6)15N(4) (R)">Label:13C(6)15N(4) (R)</option>
          <option value="Label:13C(6)15N(4)+Dimethyl (R)">Label:13C(6)15N(4)+Dimethyl (R)</option>
          <option value="Label:13C(6)15N(4)+Dimethyl:2H(6)13C(2) (R)">Label:13C(6)15N(4)+Dimethyl:2H(6)13C(2) (R)</option>
          <option value="Label:13C(6)15N(4)+Methyl (R)">Label:13C(6)15N(4)+Methyl (R)</option>
          <option value="Label:13C(6)15N(4)+Methyl:2H(3)13C(1) (R)">Label:13C(6)15N(4)+Methyl:2H(3)13C(1) (R)</option>
          <option value="Label:13C(8)15N(2) (R)">Label:13C(8)15N(2) (R)</option>
          <option value="Label:13C(9) (F)">Label:13C(9) (F)</option>
          <option value="Label:13C(9) (Y)">Label:13C(9) (Y)</option>
          <option value="Label:13C(9)+Phospho (Y)">Label:13C(9)+Phospho (Y)</option>
          <option value="Label:13C(9)15N(1) (F)">Label:13C(9)15N(1) (F)</option>
          <option value="Label:15N(1) (A)">Label:15N(1) (A)</option>
          <option value="Label:15N(1) (C)">Label:15N(1) (C)</option>
          <option value="Label:15N(1) (D)">Label:15N(1) (D)</option>
          <option value="Label:15N(1) (E)">Label:15N(1) (E)</option>
          <option value="Label:15N(1) (F)">Label:15N(1) (F)</option>
          <option value="Label:15N(1) (G)">Label:15N(1) (G)</option>
          <option value="Label:15N(1) (I)">Label:15N(1) (I)</option>
          <option value="Label:15N(1) (L)">Label:15N(1) (L)</option>
          <option value="Label:15N(1) (M)">Label:15N(1) (M)</option>
          <option value="Label:15N(1) (P)">Label:15N(1) (P)</option>
          <option value="Label:15N(1) (S)">Label:15N(1) (S)</option>
          <option value="Label:15N(1) (T)">Label:15N(1) (T)</option>
          <option value="Label:15N(1) (V)">Label:15N(1) (V)</option>
          <option value="Label:15N(1) (Y)">Label:15N(1) (Y)</option>
          <option value="Label:15N(2) (K)">Label:15N(2) (K)</option>
          <option value="Label:15N(2) (N)">Label:15N(2) (N)</option>
          <option value="Label:15N(2) (Q)">Label:15N(2) (Q)</option>
          <option value="Label:15N(2) (W)">Label:15N(2) (W)</option>
          <option value="Label:15N(2)2H(9) (K)">Label:15N(2)2H(9) (K)</option>
          <option value="Label:15N(3) (H)">Label:15N(3) (H)</option>
          <option value="Label:15N(4) (R)">Label:15N(4) (R)</option>
          <option value="Label:18O(1) (C-term)">Label:18O(1) (C-term)</option>
          <option value="Label:18O(1) (S)">Label:18O(1) (S)</option>
          <option value="Label:18O(1) (T)">Label:18O(1) (T)</option>
          <option value="Label:18O(1) (Y)">Label:18O(1) (Y)</option>
          <option value="Label:18O(2) (C-term)">Label:18O(2) (C-term)</option>
          <option value="Label:2H(10) (L)">Label:2H(10) (L)</option>
          <option value="Label:2H(3) (L)">Label:2H(3) (L)</option>
          <option value="Label:2H(3) (M)">Label:2H(3) (M)</option>
          <option value="Label:2H(3)+Oxidation (M)">Label:2H(3)+Oxidation (M)</option>
          <option value="Label:2H(4) (F)">Label:2H(4) (F)</option>
          <option value="Label:2H(4) (K)">Label:2H(4) (K)</option>
          <option value="Label:2H(4) (Y)">Label:2H(4) (Y)</option>
          <option value="Label:2H(4)+Acetyl (K)">Label:2H(4)+Acetyl (K)</option>
          <option value="Label:2H(4)+GG (K)">Label:2H(4)+GG (K)</option>
          <option value="Label:2H(4)13C(1) (R)">Label:2H(4)13C(1) (R)</option>
          <option value="Label:2H(6)15N(1) (P)">Label:2H(6)15N(1) (P)</option>
          <option value="Label:2H(7)15N(4) (R)">Label:2H(7)15N(4) (R)</option>
          <option value="Label:2H(9)13C(6)15N(2) (K)">Label:2H(9)13C(6)15N(2) (K)</option>
          <option value="Leu-&gt;MetOx (L)">Leu-&gt;MetOx (L)</option>
          <option value="Lipoyl (K)">Lipoyl (K)</option>
          <option value="Lys (N-term)">Lys (N-term)</option>
          <option value="Lys-&gt;Ala (K)">Lys-&gt;Ala (K)</option>
          <option value="Lys-&gt;Allysine (K)">Lys-&gt;Allysine (K)</option>
          <option value="Lys-&gt;AminoadipicAcid (K)">Lys-&gt;AminoadipicAcid (K)</option>
          <option value="Lys-&gt;Arg (K)">Lys-&gt;Arg (K)</option>
          <option value="Lys-&gt;Asn (K)">Lys-&gt;Asn (K)</option>
          <option value="Lys-&gt;Asp (K)">Lys-&gt;Asp (K)</option>
          <option value="Lys-&gt;CamCys (K)">Lys-&gt;CamCys (K)</option>
          <option value="Lys-&gt;Cys (K)">Lys-&gt;Cys (K)</option>
          <option value="Lys-&gt;Gln (K)">Lys-&gt;Gln (K)</option>
          <option value="Lys-&gt;Glu (K)">Lys-&gt;Glu (K)</option>
          <option value="Lys-&gt;Gly (K)">Lys-&gt;Gly (K)</option>
          <option value="Lys-&gt;His (K)">Lys-&gt;His (K)</option>
          <option value="Lys-&gt;Met (K)">Lys-&gt;Met (K)</option>
          <option value="Lys-&gt;MetOx (K)">Lys-&gt;MetOx (K)</option>
          <option value="Lys-&gt;Phe (K)">Lys-&gt;Phe (K)</option>
          <option value="Lys-&gt;Pro (K)">Lys-&gt;Pro (K)</option>
          <option value="Lys-&gt;Ser (K)">Lys-&gt;Ser (K)</option>
          <option value="Lys-&gt;Thr (K)">Lys-&gt;Thr (K)</option>
          <option value="Lys-&gt;Trp (K)">Lys-&gt;Trp (K)</option>
          <option value="Lys-&gt;Tyr (K)">Lys-&gt;Tyr (K)</option>
          <option value="Lys-&gt;Val (K)">Lys-&gt;Val (K)</option>
          <option value="Lys-&gt;Xle (K)">Lys-&gt;Xle (K)</option>
          <option value="Lysbiotinhydrazide (K)">Lysbiotinhydrazide (K)</option>
          <option value="MDCC (C)">MDCC (C)</option>
          <option value="MG-H1 (R)">MG-H1 (R)</option>
          <option value="MM-diphenylpentanone (C)">MM-diphenylpentanone (C)</option>
          <option value="MTSL (C)">MTSL (C)</option>
          <option value="Maleimide-PEO2-Biotin (C)">Maleimide-PEO2-Biotin (C)</option>
          <option value="Malonyl (C)">Malonyl (C)</option>
          <option value="Malonyl (S)">Malonyl (S)</option>
          <option value="Menadione (C)">Menadione (C)</option>
          <option value="Menadione (K)">Menadione (K)</option>
          <option value="Menadione-HQ (C)">Menadione-HQ (C)</option>
          <option value="Menadione-HQ (K)">Menadione-HQ (K)</option>
          <option value="MercaptoEthanol (S)">MercaptoEthanol (S)</option>
          <option value="MercaptoEthanol (T)">MercaptoEthanol (T)</option>
          <option value="Met-&gt;Aha (M)">Met-&gt;Aha (M)</option>
          <option value="Met-&gt;Ala (M)">Met-&gt;Ala (M)</option>
          <option value="Met-&gt;Arg (M)">Met-&gt;Arg (M)</option>
          <option value="Met-&gt;Asn (M)">Met-&gt;Asn (M)</option>
          <option value="Met-&gt;Asp (M)">Met-&gt;Asp (M)</option>
          <option value="Met-&gt;Cys (M)">Met-&gt;Cys (M)</option>
          <option value="Met-&gt;Gln (M)">Met-&gt;Gln (M)</option>
          <option value="Met-&gt;Glu (M)">Met-&gt;Glu (M)</option>
          <option value="Met-&gt;Gly (M)">Met-&gt;Gly (M)</option>
          <option value="Met-&gt;His (M)">Met-&gt;His (M)</option>
          <option value="Met-&gt;Hpg (M)">Met-&gt;Hpg (M)</option>
          <option value="Met-&gt;Hse (C-term M)">Met-&gt;Hse (C-term M)</option>
          <option value="Met-&gt;Hsl (C-term M)">Met-&gt;Hsl (C-term M)</option>
          <option value="Met-&gt;Lys (M)">Met-&gt;Lys (M)</option>
          <option value="Met-&gt;Phe (M)">Met-&gt;Phe (M)</option>
          <option value="Met-&gt;Pro (M)">Met-&gt;Pro (M)</option>
          <option value="Met-&gt;Ser (M)">Met-&gt;Ser (M)</option>
          <option value="Met-&gt;Thr (M)">Met-&gt;Thr (M)</option>
          <option value="Met-&gt;Trp (M)">Met-&gt;Trp (M)</option>
          <option value="Met-&gt;Tyr (M)">Met-&gt;Tyr (M)</option>
          <option value="Met-&gt;Val (M)">Met-&gt;Val (M)</option>
          <option value="Met-&gt;Xle (M)">Met-&gt;Xle (M)</option>
          <option value="Methyl (C)">Methyl (C)</option>
          <option value="Methyl (C-term)">Methyl (C-term)</option>
          <option value="Methyl (D)">Methyl (D)</option>
          <option value="Methyl (E)">Methyl (E)</option>
          <option value="Methyl (H)">Methyl (H)</option>
          <option value="Methyl (I)">Methyl (I)</option>
          <option value="Methyl (K)">Methyl (K)</option>
          <option value="Methyl (L)">Methyl (L)</option>
          <option value="Methyl (N)">Methyl (N)</option>
          <option value="Methyl (N-term)">Methyl (N-term)</option>
          <option value="Methyl (Q)">Methyl (Q)</option>
          <option value="Methyl (R)">Methyl (R)</option>
          <option value="Methyl (S)">Methyl (S)</option>
          <option value="Methyl (T)">Methyl (T)</option>
          <option value="Methyl+Acetyl:2H(3) (K)">Methyl+Acetyl:2H(3) (K)</option>
          <option value="Methyl+Deamidated (N)">Methyl+Deamidated (N)</option>
          <option value="Methyl+Deamidated (Q)">Methyl+Deamidated (Q)</option>
          <option value="Methyl-PEO12-Maleimide (C)">Methyl-PEO12-Maleimide (C)</option>
          <option value="Methyl:2H(2) (K)">Methyl:2H(2) (K)</option>
          <option value="Methyl:2H(3) (C-term)">Methyl:2H(3) (C-term)</option>
          <option value="Methyl:2H(3) (D)">Methyl:2H(3) (D)</option>
          <option value="Methyl:2H(3) (E)">Methyl:2H(3) (E)</option>
          <option value="Methyl:2H(3) (K)">Methyl:2H(3) (K)</option>
          <option value="Methyl:2H(3) (R)">Methyl:2H(3) (R)</option>
          <option value="Methyl:2H(3)+Acetyl:2H(3) (K)">Methyl:2H(3)+Acetyl:2H(3) (K)</option>
          <option value="Methyl:2H(3)13C(1) (K)">Methyl:2H(3)13C(1) (K)</option>
          <option value="Methyl:2H(3)13C(1) (R)">Methyl:2H(3)13C(1) (R)</option>
          <option value="Methylamine (S)">Methylamine (S)</option>
          <option value="Methylamine (T)">Methylamine (T)</option>
          <option value="Methylmalonylation (S)">Methylmalonylation (S)</option>
          <option value="Methylphosphonate (S)">Methylphosphonate (S)</option>
          <option value="Methylphosphonate (T)">Methylphosphonate (T)</option>
          <option value="Methylphosphonate (Y)">Methylphosphonate (Y)</option>
          <option value="Methylpyrroline (K)">Methylpyrroline (K)</option>
          <option value="Methylthio (C)">Methylthio (C)</option>
          <option value="Methylthio (D)">Methylthio (D)</option>
          <option value="Methylthio (K)">Methylthio (K)</option>
          <option value="Methylthio (N)">Methylthio (N)</option>
          <option value="Methylthio (N-term)">Methylthio (N-term)</option>
          <option value="Molybdopterin (C)">Molybdopterin (C)</option>
          <option value="MolybdopterinGD (C)">MolybdopterinGD (C)</option>
          <option value="MolybdopterinGD (D)">MolybdopterinGD (D)</option>
          <option value="MolybdopterinGD+Delta:S(-1)Se(1) (C)">MolybdopterinGD+Delta:S(-1)Se(1) (C)</option>
          <option value="MurNAc (A)">MurNAc (A)</option>
          <option value="Myristoyl (C)">Myristoyl (C)</option>
          <option value="Myristoyl (K)">Myristoyl (K)</option>
          <option value="Myristoyl (N-term G)">Myristoyl (N-term G)</option>
          <option value="N-dimethylphosphate (S)">N-dimethylphosphate (S)</option>
          <option value="NA-LNO2 (C)">NA-LNO2 (C)</option>
          <option value="NA-LNO2 (H)">NA-LNO2 (H)</option>
          <option value="NA-OA-NO2 (C)">NA-OA-NO2 (C)</option>
          <option value="NA-OA-NO2 (H)">NA-OA-NO2 (H)</option>
          <option value="NBS (W)">NBS (W)</option>
          <option value="NBS:13C(6) (W)">NBS:13C(6) (W)</option>
          <option value="NDA (K)">NDA (K)</option>
          <option value="NDA (N-term)">NDA (N-term)</option>
          <option value="NEIAA (C)">NEIAA (C)</option>
          <option value="NEIAA (Y)">NEIAA (Y)</option>
          <option value="NEIAA:2H(5) (C)">NEIAA:2H(5) (C)</option>
          <option value="NEIAA:2H(5) (Y)">NEIAA:2H(5) (Y)</option>
          <option value="NEM:2H(5) (C)">NEM:2H(5) (C)</option>
          <option value="NEM:2H(5)+H2O (C)">NEM:2H(5)+H2O (C)</option>
          <option value="NEMsulfur (C)">NEMsulfur (C)</option>
          <option value="NEMsulfurWater (C)">NEMsulfurWater (C)</option>
          <option value="NHS-LC-Biotin (K)">NHS-LC-Biotin (K)</option>
          <option value="NHS-LC-Biotin (N-term)">NHS-LC-Biotin (N-term)</option>
          <option value="NHS-fluorescein (K)">NHS-fluorescein (K)</option>
          <option value="NIC (K)">NIC (K)</option>
          <option value="NIC (N-term)">NIC (N-term)</option>
          <option value="NIPCAM (C)">NIPCAM (C)</option>
          <option value="NO_SMX_SEMD (C)">NO_SMX_SEMD (C)</option>
          <option value="NO_SMX_SIMD (C)">NO_SMX_SIMD (C)</option>
          <option value="NO_SMX_SMCT (C)">NO_SMX_SMCT (C)</option>
          <option value="Nethylmaleimide (C)">Nethylmaleimide (C)</option>
          <option value="Nethylmaleimide+water (C)">Nethylmaleimide+water (C)</option>
          <option value="Nethylmaleimide+water (K)">Nethylmaleimide+water (K)</option>
          <option value="NeuAc (N)">NeuAc (N)</option>
          <option value="NeuAc (S)">NeuAc (S)</option>
          <option value="NeuAc (T)">NeuAc (T)</option>
          <option value="NeuGc (N)">NeuGc (N)</option>
          <option value="NeuGc (S)">NeuGc (S)</option>
          <option value="NeuGc (T)">NeuGc (T)</option>
          <option value="Nitro (W)">Nitro (W)</option>
          <option value="Nitro (Y)">Nitro (Y)</option>
          <option value="Nitrosyl (C)">Nitrosyl (C)</option>
          <option value="Nmethylmaleimide (C)">Nmethylmaleimide (C)</option>
          <option value="Nmethylmaleimide (K)">Nmethylmaleimide (K)</option>
          <option value="Nmethylmaleimide+water (C)">Nmethylmaleimide+water (C)</option>
          <option value="O-Dimethylphosphate (S)">O-Dimethylphosphate (S)</option>
          <option value="O-Dimethylphosphate (T)">O-Dimethylphosphate (T)</option>
          <option value="O-Dimethylphosphate (Y)">O-Dimethylphosphate (Y)</option>
          <option value="O-Et-N-diMePhospho (S)">O-Et-N-diMePhospho (S)</option>
          <option value="O-Isopropylmethylphosphonate (S)">O-Isopropylmethylphosphonate (S)</option>
          <option value="O-Isopropylmethylphosphonate (T)">O-Isopropylmethylphosphonate (T)</option>
          <option value="O-Isopropylmethylphosphonate (Y)">O-Isopropylmethylphosphonate (Y)</option>
          <option value="O-Methylphosphate (S)">O-Methylphosphate (S)</option>
          <option value="O-Methylphosphate (T)">O-Methylphosphate (T)</option>
          <option value="O-Methylphosphate (Y)">O-Methylphosphate (Y)</option>
          <option value="O-pinacolylmethylphosphonate (H)">O-pinacolylmethylphosphonate (H)</option>
          <option value="O-pinacolylmethylphosphonate (K)">O-pinacolylmethylphosphonate (K)</option>
          <option value="O-pinacolylmethylphosphonate (S)">O-pinacolylmethylphosphonate (S)</option>
          <option value="O-pinacolylmethylphosphonate (T)">O-pinacolylmethylphosphonate (T)</option>
          <option value="O-pinacolylmethylphosphonate (Y)">O-pinacolylmethylphosphonate (Y)</option>
          <option value="Octanoyl (C)">Octanoyl (C)</option>
          <option value="Octanoyl (S)">Octanoyl (S)</option>
          <option value="Octanoyl (T)">Octanoyl (T)</option>
          <option value="OxArgBiotin (R)">OxArgBiotin (R)</option>
          <option value="OxArgBiotinRed (R)">OxArgBiotinRed (R)</option>
          <option value="OxLysBiotin (K)">OxLysBiotin (K)</option>
          <option value="OxLysBiotinRed (K)">OxLysBiotinRed (K)</option>
          <option value="OxProBiotin (P)">OxProBiotin (P)</option>
          <option value="OxProBiotinRed (P)">OxProBiotinRed (P)</option>
          <option value="Oxidation (C)">Oxidation (C)</option>
          <option value="Oxidation (C-term G)">Oxidation (C-term G)</option>
          <option value="Oxidation (D)">Oxidation (D)</option>
          <option value="Oxidation (F)">Oxidation (F)</option>
          <option value="Oxidation (H)">Oxidation (H)</option>
          <option value="Oxidation (K)">Oxidation (K)</option>
          <option value="Oxidation (M)">Oxidation (M)</option>
          <option value="Oxidation (N)">Oxidation (N)</option>
          <option value="Oxidation (P)">Oxidation (P)</option>
          <option value="Oxidation (R)">Oxidation (R)</option>
          <option value="Oxidation (W)">Oxidation (W)</option>
          <option value="Oxidation (Y)">Oxidation (Y)</option>
          <option value="Oxidation+NEM (C)">Oxidation+NEM (C)</option>
          <option value="PEITC (C)">PEITC (C)</option>
          <option value="PEITC (K)">PEITC (K)</option>
          <option value="PEITC (N-term)">PEITC (N-term)</option>
          <option value="PEO-Iodoacetyl-LC-Biotin (C)">PEO-Iodoacetyl-LC-Biotin (C)</option>
          <option value="PET (S)">PET (S)</option>
          <option value="PET (T)">PET (T)</option>
          <option value="PS_Hapten (C)">PS_Hapten (C)</option>
          <option value="PS_Hapten (H)">PS_Hapten (H)</option>
          <option value="PS_Hapten (K)">PS_Hapten (K)</option>
          <option value="Palmitoleyl (C)">Palmitoleyl (C)</option>
          <option value="Palmitoleyl (S)">Palmitoleyl (S)</option>
          <option value="Palmitoleyl (T)">Palmitoleyl (T)</option>
          <option value="Palmitoyl (C)">Palmitoyl (C)</option>
          <option value="Palmitoyl (K)">Palmitoyl (K)</option>
          <option value="Palmitoyl (S)">Palmitoyl (S)</option>
          <option value="Palmitoyl (T)">Palmitoyl (T)</option>
          <option value="Pentylamine (Q)">Pentylamine (Q)</option>
          <option value="Phe-&gt;Ala (F)">Phe-&gt;Ala (F)</option>
          <option value="Phe-&gt;Arg (F)">Phe-&gt;Arg (F)</option>
          <option value="Phe-&gt;Asn (F)">Phe-&gt;Asn (F)</option>
          <option value="Phe-&gt;Asp (F)">Phe-&gt;Asp (F)</option>
          <option value="Phe-&gt;CamCys (F)">Phe-&gt;CamCys (F)</option>
          <option value="Phe-&gt;Cys (F)">Phe-&gt;Cys (F)</option>
          <option value="Phe-&gt;Gln (F)">Phe-&gt;Gln (F)</option>
          <option value="Phe-&gt;Glu (F)">Phe-&gt;Glu (F)</option>
          <option value="Phe-&gt;Gly (F)">Phe-&gt;Gly (F)</option>
          <option value="Phe-&gt;His (F)">Phe-&gt;His (F)</option>
          <option value="Phe-&gt;Lys (F)">Phe-&gt;Lys (F)</option>
          <option value="Phe-&gt;Met (F)">Phe-&gt;Met (F)</option>
          <option value="Phe-&gt;Pro (F)">Phe-&gt;Pro (F)</option>
          <option value="Phe-&gt;Ser (F)">Phe-&gt;Ser (F)</option>
          <option value="Phe-&gt;Thr (F)">Phe-&gt;Thr (F)</option>
          <option value="Phe-&gt;Trp (F)">Phe-&gt;Trp (F)</option>
          <option value="Phe-&gt;Tyr (F)">Phe-&gt;Tyr (F)</option>
          <option value="Phe-&gt;Val (F)">Phe-&gt;Val (F)</option>
          <option value="Phe-&gt;Xle (F)">Phe-&gt;Xle (F)</option>
          <option value="Phenylisocyanate (N-term)">Phenylisocyanate (N-term)</option>
          <option value="Phenylisocyanate:2H(5) (N-term)">Phenylisocyanate:2H(5) (N-term)</option>
          <option value="Phospho (C)">Phospho (C)</option>
          <option value="Phospho (D)">Phospho (D)</option>
          <option value="Phospho (H)">Phospho (H)</option>
          <option value="Phospho (K)">Phospho (K)</option>
          <option value="Phospho (R)">Phospho (R)</option>
          <option value="Phospho (S)">Phospho (S)</option>
          <option value="Phospho (T)">Phospho (T)</option>
          <option value="Phospho (Y)">Phospho (Y)</option>
          <option value="PhosphoHex (S)">PhosphoHex (S)</option>
          <option value="PhosphoHexNAc (S)">PhosphoHexNAc (S)</option>
          <option value="PhosphoHexNAc (T)">PhosphoHexNAc (T)</option>
          <option value="PhosphoUridine (H)">PhosphoUridine (H)</option>
          <option value="PhosphoUridine (Y)">PhosphoUridine (Y)</option>
          <option value="Phosphoadenosine (H)">Phosphoadenosine (H)</option>
          <option value="Phosphoadenosine (K)">Phosphoadenosine (K)</option>
          <option value="Phosphoadenosine (T)">Phosphoadenosine (T)</option>
          <option value="Phosphoadenosine (Y)">Phosphoadenosine (Y)</option>
          <option value="Phosphogluconoylation (K)">Phosphogluconoylation (K)</option>
          <option value="Phosphogluconoylation (N-term)">Phosphogluconoylation (N-term)</option>
          <option value="Phosphoguanosine (H)">Phosphoguanosine (H)</option>
          <option value="Phosphoguanosine (K)">Phosphoguanosine (K)</option>
          <option value="Phosphopantetheine (S)">Phosphopantetheine (S)</option>
          <option value="Phosphopropargyl (S)">Phosphopropargyl (S)</option>
          <option value="Phosphopropargyl (T)">Phosphopropargyl (T)</option>
          <option value="Phosphopropargyl (Y)">Phosphopropargyl (Y)</option>
          <option value="PhosphoribosyldephosphoCoA (S)">PhosphoribosyldephosphoCoA (S)</option>
          <option value="Phycocyanobilin (C)">Phycocyanobilin (C)</option>
          <option value="Phycoerythrobilin (C)">Phycoerythrobilin (C)</option>
          <option value="Phytochromobilin (C)">Phytochromobilin (C)</option>
          <option value="Piperidine (K)">Piperidine (K)</option>
          <option value="Piperidine (N-term)">Piperidine (N-term)</option>
          <option value="Pro-&gt;Ala (P)">Pro-&gt;Ala (P)</option>
          <option value="Pro-&gt;Arg (P)">Pro-&gt;Arg (P)</option>
          <option value="Pro-&gt;Asn (P)">Pro-&gt;Asn (P)</option>
          <option value="Pro-&gt;Asp (P)">Pro-&gt;Asp (P)</option>
          <option value="Pro-&gt;Cys (P)">Pro-&gt;Cys (P)</option>
          <option value="Pro-&gt;Gln (P)">Pro-&gt;Gln (P)</option>
          <option value="Pro-&gt;Glu (P)">Pro-&gt;Glu (P)</option>
          <option value="Pro-&gt;Gly (P)">Pro-&gt;Gly (P)</option>
          <option value="Pro-&gt;His (P)">Pro-&gt;His (P)</option>
          <option value="Pro-&gt;Lys (P)">Pro-&gt;Lys (P)</option>
          <option value="Pro-&gt;Met (P)">Pro-&gt;Met (P)</option>
          <option value="Pro-&gt;Phe (P)">Pro-&gt;Phe (P)</option>
          <option value="Pro-&gt;Pyrrolidinone (P)">Pro-&gt;Pyrrolidinone (P)</option>
          <option value="Pro-&gt;Pyrrolidone (P)">Pro-&gt;Pyrrolidone (P)</option>
          <option value="Pro-&gt;Ser (P)">Pro-&gt;Ser (P)</option>
          <option value="Pro-&gt;Thr (P)">Pro-&gt;Thr (P)</option>
          <option value="Pro-&gt;Trp (P)">Pro-&gt;Trp (P)</option>
          <option value="Pro-&gt;Tyr (P)">Pro-&gt;Tyr (P)</option>
          <option value="Pro-&gt;Val (P)">Pro-&gt;Val (P)</option>
          <option value="Pro-&gt;Xle (P)">Pro-&gt;Xle (P)</option>
          <option value="Pro-&gt;pyro-Glu (P)">Pro-&gt;pyro-Glu (P)</option>
          <option value="Propargylamine (C-term)">Propargylamine (C-term)</option>
          <option value="Propargylamine (D)">Propargylamine (D)</option>
          <option value="Propargylamine (E)">Propargylamine (E)</option>
          <option value="Propionamide (C)">Propionamide (C)</option>
          <option value="Propionamide (K)">Propionamide (K)</option>
          <option value="Propionamide (N-term)">Propionamide (N-term)</option>
          <option value="Propionamide:2H(3) (C)">Propionamide:2H(3) (C)</option>
          <option value="Propionyl (K)">Propionyl (K)</option>
          <option value="Propionyl (N-term)">Propionyl (N-term)</option>
          <option value="Propionyl (S)">Propionyl (S)</option>
          <option value="Propionyl (T)">Propionyl (T)</option>
          <option value="Propionyl:13C(3) (K)">Propionyl:13C(3) (K)</option>
          <option value="Propionyl:13C(3) (N-term)">Propionyl:13C(3) (N-term)</option>
          <option value="Propiophenone (C)">Propiophenone (C)</option>
          <option value="Propiophenone (H)">Propiophenone (H)</option>
          <option value="Propiophenone (K)">Propiophenone (K)</option>
          <option value="Propiophenone (R)">Propiophenone (R)</option>
          <option value="Propiophenone (S)">Propiophenone (S)</option>
          <option value="Propiophenone (T)">Propiophenone (T)</option>
          <option value="Propiophenone (W)">Propiophenone (W)</option>
          <option value="Propyl (K)">Propyl (K)</option>
          <option value="Propyl (N-term)">Propyl (N-term)</option>
          <option value="Propyl:2H(6) (K)">Propyl:2H(6) (K)</option>
          <option value="Propyl:2H(6) (N-term)">Propyl:2H(6) (N-term)</option>
          <option value="PropylNAGthiazoline (C)">PropylNAGthiazoline (C)</option>
          <option value="Puromycin (C-term)">Puromycin (C-term)</option>
          <option value="PyMIC (N-term)">PyMIC (N-term)</option>
          <option value="PyridoxalPhosphate (K)">PyridoxalPhosphate (K)</option>
          <option value="PyridoxalPhosphateH2 (K)">PyridoxalPhosphateH2 (K)</option>
          <option value="Pyridylacetyl (K)">Pyridylacetyl (K)</option>
          <option value="Pyridylacetyl (N-term)">Pyridylacetyl (N-term)</option>
          <option value="Pyridylethyl (C)">Pyridylethyl (C)</option>
          <option value="Pyro-carbamidomethyl (N-term C)">Pyro-carbamidomethyl (N-term C)</option>
          <option value="PyruvicAcidIminyl (K)">PyruvicAcidIminyl (K)</option>
          <option value="QAT (C)">QAT (C)</option>
          <option value="QAT:2H(3) (C)">QAT:2H(3) (C)</option>
          <option value="QEQTGG (K)">QEQTGG (K)</option>
          <option value="QQQTGG (K)">QQQTGG (K)</option>
          <option value="QTGG (K)">QTGG (K)</option>
          <option value="Quinone (W)">Quinone (W)</option>
          <option value="Quinone (Y)">Quinone (Y)</option>
          <option value="RNPXlink1 (C)">RNPXlink1 (C)</option>
          <option value="RNPXlink2 (F)">RNPXlink2 (F)</option>
          <option value="RNPXlink2 (K)">RNPXlink2 (K)</option>
          <option value="RNPXlink2 (L)">RNPXlink2 (L)</option>
          <option value="RNPXlink3 (C)">RNPXlink3 (C)</option>
          <option value="RNPXlink3 (F)">RNPXlink3 (F)</option>
          <option value="RNPXlink4 (C)">RNPXlink4 (C)</option>
          <option value="RNPXlink5 (F)">RNPXlink5 (F)</option>
          <option value="RNPXlink5 (Y)">RNPXlink5 (Y)</option>
          <option value="Retinylidene (K)">Retinylidene (K)</option>
          <option value="SMA (K)">SMA (K)</option>
          <option value="SMA (N-term)">SMA (N-term)</option>
          <option value="SMCC-maleimide (C)">SMCC-maleimide (C)</option>
          <option value="SPITC (K)">SPITC (K)</option>
          <option value="SPITC (N-term)">SPITC (N-term)</option>
          <option value="SPITC:13C(6) (K)">SPITC:13C(6) (K)</option>
          <option value="SPITC:13C(6) (N-term)">SPITC:13C(6) (N-term)</option>
          <option value="SUMO2135 (K)">SUMO2135 (K)</option>
          <option value="SUMO3549 (K)">SUMO3549 (K)</option>
          <option value="Saligenin (H)">Saligenin (H)</option>
          <option value="Saligenin (K)">Saligenin (K)</option>
          <option value="SecCarbamidomethyl (C)">SecCarbamidomethyl (C)</option>
          <option value="SecNEM (C)">SecNEM (C)</option>
          <option value="SecNEM:2H(5) (C)">SecNEM:2H(5) (C)</option>
          <option value="Ser-&gt;Ala (S)">Ser-&gt;Ala (S)</option>
          <option value="Ser-&gt;Arg (S)">Ser-&gt;Arg (S)</option>
          <option value="Ser-&gt;Asn (S)">Ser-&gt;Asn (S)</option>
          <option value="Ser-&gt;Asp (S)">Ser-&gt;Asp (S)</option>
          <option value="Ser-&gt;Cys (S)">Ser-&gt;Cys (S)</option>
          <option value="Ser-&gt;Gln (S)">Ser-&gt;Gln (S)</option>
          <option value="Ser-&gt;Glu (S)">Ser-&gt;Glu (S)</option>
          <option value="Ser-&gt;Gly (S)">Ser-&gt;Gly (S)</option>
          <option value="Ser-&gt;His (S)">Ser-&gt;His (S)</option>
          <option value="Ser-&gt;Lys (S)">Ser-&gt;Lys (S)</option>
          <option value="Ser-&gt;Met (S)">Ser-&gt;Met (S)</option>
          <option value="Ser-&gt;Phe (S)">Ser-&gt;Phe (S)</option>
          <option value="Ser-&gt;Pro (S)">Ser-&gt;Pro (S)</option>
          <option value="Ser-&gt;Thr (S)">Ser-&gt;Thr (S)</option>
          <option value="Ser-&gt;Trp (S)">Ser-&gt;Trp (S)</option>
          <option value="Ser-&gt;Tyr (S)">Ser-&gt;Tyr (S)</option>
          <option value="Ser-&gt;Val (S)">Ser-&gt;Val (S)</option>
          <option value="Ser-&gt;Xle (S)">Ser-&gt;Xle (S)</option>
          <option value="Succinyl (K)">Succinyl (K)</option>
          <option value="Succinyl (N-term)">Succinyl (N-term)</option>
          <option value="Succinyl:13C(4) (K)">Succinyl:13C(4) (K)</option>
          <option value="Succinyl:13C(4) (N-term)">Succinyl:13C(4) (N-term)</option>
          <option value="Succinyl:2H(4) (K)">Succinyl:2H(4) (K)</option>
          <option value="Succinyl:2H(4) (N-term)">Succinyl:2H(4) (N-term)</option>
          <option value="SulfanilicAcid (C-term)">SulfanilicAcid (C-term)</option>
          <option value="SulfanilicAcid (D)">SulfanilicAcid (D)</option>
          <option value="SulfanilicAcid (E)">SulfanilicAcid (E)</option>
          <option value="SulfanilicAcid:13C(6) (C-term)">SulfanilicAcid:13C(6) (C-term)</option>
          <option value="SulfanilicAcid:13C(6) (D)">SulfanilicAcid:13C(6) (D)</option>
          <option value="SulfanilicAcid:13C(6) (E)">SulfanilicAcid:13C(6) (E)</option>
          <option value="Sulfide (C)">Sulfide (C)</option>
          <option value="Sulfide (D)">Sulfide (D)</option>
          <option value="Sulfide (W)">Sulfide (W)</option>
          <option value="Sulfo (C)">Sulfo (C)</option>
          <option value="Sulfo (S)">Sulfo (S)</option>
          <option value="Sulfo (T)">Sulfo (T)</option>
          <option value="Sulfo (Y)">Sulfo (Y)</option>
          <option value="Sulfo-NHS-LC-LC-Biotin (K)">Sulfo-NHS-LC-LC-Biotin (K)</option>
          <option value="Sulfo-NHS-LC-LC-Biotin (N-term)">Sulfo-NHS-LC-LC-Biotin (N-term)</option>
          <option value="SulfoGMBS (C)">SulfoGMBS (C)</option>
          <option value="SulfurDioxide (C)">SulfurDioxide (C)</option>
          <option value="TAMRA-FP (S)">TAMRA-FP (S)</option>
          <option value="TAMRA-FP (Y)">TAMRA-FP (Y)</option>
          <option value="TMAB (K)">TMAB (K)</option>
          <option value="TMAB (N-term)">TMAB (N-term)</option>
          <option value="TMAB:2H(9) (K)">TMAB:2H(9) (K)</option>
          <option value="TMAB:2H(9) (N-term)">TMAB:2H(9) (N-term)</option>
          <option value="TMPP-Ac (N-term)">TMPP-Ac (N-term)</option>
          <option value="TMT (H)">TMT (H)</option>
          <option value="TMT (K)">TMT (K)</option>
          <option value="TMT (N-term)">TMT (N-term)</option>
          <option value="TMT (S)">TMT (S)</option>
          <option value="TMT (T)">TMT (T)</option>
          <option value="TMT2plex (H)">TMT2plex (H)</option>
          <option value="TMT2plex (K)">TMT2plex (K)</option>
          <option value="TMT2plex (N-term)">TMT2plex (N-term)</option>
          <option value="TMT2plex (S)">TMT2plex (S)</option>
          <option value="TMT2plex (T)">TMT2plex (T)</option>
          <option value="TMT6plex (H)">TMT6plex (H)</option>
          <option value="TMT6plex (K)">TMT6plex (K)</option>
          <option value="TMT6plex (N-term)">TMT6plex (N-term)</option>
          <option value="TMT6plex (S)">TMT6plex (S)</option>
          <option value="TMT6plex (T)">TMT6plex (T)</option>
          <option value="TNBS (K)">TNBS (K)</option>
          <option value="TNBS (N-term)">TNBS (N-term)</option>
          <option value="Thiadiazole (C)">Thiadiazole (C)</option>
          <option value="Thiazolidine (N-term C)">Thiazolidine (N-term C)</option>
          <option value="Thioacyl (K)">Thioacyl (K)</option>
          <option value="Thioacyl (N-term)">Thioacyl (N-term)</option>
          <option value="Thiophos-S-S-biotin (S)">Thiophos-S-S-biotin (S)</option>
          <option value="Thiophos-S-S-biotin (T)">Thiophos-S-S-biotin (T)</option>
          <option value="Thiophos-S-S-biotin (Y)">Thiophos-S-S-biotin (Y)</option>
          <option value="Thiophospho (S)">Thiophospho (S)</option>
          <option value="Thiophospho (T)">Thiophospho (T)</option>
          <option value="Thiophospho (Y)">Thiophospho (Y)</option>
          <option value="Thr-&gt;Ala (T)">Thr-&gt;Ala (T)</option>
          <option value="Thr-&gt;Arg (T)">Thr-&gt;Arg (T)</option>
          <option value="Thr-&gt;Asn (T)">Thr-&gt;Asn (T)</option>
          <option value="Thr-&gt;Asp (T)">Thr-&gt;Asp (T)</option>
          <option value="Thr-&gt;Cys (T)">Thr-&gt;Cys (T)</option>
          <option value="Thr-&gt;Gln (T)">Thr-&gt;Gln (T)</option>
          <option value="Thr-&gt;Glu (T)">Thr-&gt;Glu (T)</option>
          <option value="Thr-&gt;Gly (T)">Thr-&gt;Gly (T)</option>
          <option value="Thr-&gt;His (T)">Thr-&gt;His (T)</option>
          <option value="Thr-&gt;Lys (T)">Thr-&gt;Lys (T)</option>
          <option value="Thr-&gt;Met (T)">Thr-&gt;Met (T)</option>
          <option value="Thr-&gt;Phe (T)">Thr-&gt;Phe (T)</option>
          <option value="Thr-&gt;Pro (T)">Thr-&gt;Pro (T)</option>
          <option value="Thr-&gt;Ser (T)">Thr-&gt;Ser (T)</option>
          <option value="Thr-&gt;Trp (T)">Thr-&gt;Trp (T)</option>
          <option value="Thr-&gt;Tyr (T)">Thr-&gt;Tyr (T)</option>
          <option value="Thr-&gt;Val (T)">Thr-&gt;Val (T)</option>
          <option value="Thr-&gt;Xle (T)">Thr-&gt;Xle (T)</option>
          <option value="Thrbiotinhydrazide (T)">Thrbiotinhydrazide (T)</option>
          <option value="Thyroxine (Y)">Thyroxine (Y)</option>
          <option value="Triiodo (Y)">Triiodo (Y)</option>
          <option value="Triiodothyronine (Y)">Triiodothyronine (Y)</option>
          <option value="Trimethyl (K)">Trimethyl (K)</option>
          <option value="Trimethyl (R)">Trimethyl (R)</option>
          <option value="Trimethyl:13C(3)2H(9) (K)">Trimethyl:13C(3)2H(9) (K)</option>
          <option value="Trimethyl:13C(3)2H(9) (R)">Trimethyl:13C(3)2H(9) (R)</option>
          <option value="Trimethyl:2H(9) (K)">Trimethyl:2H(9) (K)</option>
          <option value="Trimethyl:2H(9) (R)">Trimethyl:2H(9) (R)</option>
          <option value="Trioxidation (C)">Trioxidation (C)</option>
          <option value="Trioxidation (W)">Trioxidation (W)</option>
          <option value="Trioxidation (Y)">Trioxidation (Y)</option>
          <option value="Trp-&gt;Ala (W)">Trp-&gt;Ala (W)</option>
          <option value="Trp-&gt;Arg (W)">Trp-&gt;Arg (W)</option>
          <option value="Trp-&gt;Asn (W)">Trp-&gt;Asn (W)</option>
          <option value="Trp-&gt;Asp (W)">Trp-&gt;Asp (W)</option>
          <option value="Trp-&gt;Cys (W)">Trp-&gt;Cys (W)</option>
          <option value="Trp-&gt;Gln (W)">Trp-&gt;Gln (W)</option>
          <option value="Trp-&gt;Glu (W)">Trp-&gt;Glu (W)</option>
          <option value="Trp-&gt;Gly (W)">Trp-&gt;Gly (W)</option>
          <option value="Trp-&gt;His (W)">Trp-&gt;His (W)</option>
          <option value="Trp-&gt;Hydroxykynurenin (W)">Trp-&gt;Hydroxykynurenin (W)</option>
          <option value="Trp-&gt;Kynurenin (W)">Trp-&gt;Kynurenin (W)</option>
          <option value="Trp-&gt;Lys (W)">Trp-&gt;Lys (W)</option>
          <option value="Trp-&gt;Met (W)">Trp-&gt;Met (W)</option>
          <option value="Trp-&gt;Oxolactone (W)">Trp-&gt;Oxolactone (W)</option>
          <option value="Trp-&gt;Phe (W)">Trp-&gt;Phe (W)</option>
          <option value="Trp-&gt;Pro (W)">Trp-&gt;Pro (W)</option>
          <option value="Trp-&gt;Ser (W)">Trp-&gt;Ser (W)</option>
          <option value="Trp-&gt;Thr (W)">Trp-&gt;Thr (W)</option>
          <option value="Trp-&gt;Tyr (W)">Trp-&gt;Tyr (W)</option>
          <option value="Trp-&gt;Val (W)">Trp-&gt;Val (W)</option>
          <option value="Trp-&gt;Xle (W)">Trp-&gt;Xle (W)</option>
          <option value="Tyr-&gt;Ala (Y)">Tyr-&gt;Ala (Y)</option>
          <option value="Tyr-&gt;Arg (Y)">Tyr-&gt;Arg (Y)</option>
          <option value="Tyr-&gt;Asn (Y)">Tyr-&gt;Asn (Y)</option>
          <option value="Tyr-&gt;Asp (Y)">Tyr-&gt;Asp (Y)</option>
          <option value="Tyr-&gt;Cys (Y)">Tyr-&gt;Cys (Y)</option>
          <option value="Tyr-&gt;Dha (Y)">Tyr-&gt;Dha (Y)</option>
          <option value="Tyr-&gt;Gln (Y)">Tyr-&gt;Gln (Y)</option>
          <option value="Tyr-&gt;Glu (Y)">Tyr-&gt;Glu (Y)</option>
          <option value="Tyr-&gt;Gly (Y)">Tyr-&gt;Gly (Y)</option>
          <option value="Tyr-&gt;His (Y)">Tyr-&gt;His (Y)</option>
          <option value="Tyr-&gt;Lys (Y)">Tyr-&gt;Lys (Y)</option>
          <option value="Tyr-&gt;Met (Y)">Tyr-&gt;Met (Y)</option>
          <option value="Tyr-&gt;Phe (Y)">Tyr-&gt;Phe (Y)</option>
          <option value="Tyr-&gt;Pro (Y)">Tyr-&gt;Pro (Y)</option>
          <option value="Tyr-&gt;Ser (Y)">Tyr-&gt;Ser (Y)</option>
          <option value="Tyr-&gt;Thr (Y)">Tyr-&gt;Thr (Y)</option>
          <option value="Tyr-&gt;Trp (Y)">Tyr-&gt;Trp (Y)</option>
          <option value="Tyr-&gt;Val (Y)">Tyr-&gt;Val (Y)</option>
          <option value="Tyr-&gt;Xle (Y)">Tyr-&gt;Xle (Y)</option>
          <option value="Ub-Br2 (C)">Ub-Br2 (C)</option>
          <option value="Ub-VME (C)">Ub-VME (C)</option>
          <option value="Ub-amide (C)">Ub-amide (C)</option>
          <option value="Ub-fluorescein (C)">Ub-fluorescein (C)</option>
          <option value="UgiJoullie (D)">UgiJoullie (D)</option>
          <option value="UgiJoullie (E)">UgiJoullie (E)</option>
          <option value="UgiJoullieProGly (D)">UgiJoullieProGly (D)</option>
          <option value="UgiJoullieProGly (E)">UgiJoullieProGly (E)</option>
          <option value="UgiJoullieProGlyProGly (D)">UgiJoullieProGlyProGly (D)</option>
          <option value="UgiJoullieProGlyProGly (E)">UgiJoullieProGlyProGly (E)</option>
          <option value="VFQQQTGG (K)">VFQQQTGG (K)</option>
          <option value="VIEVYQEQTGG (K)">VIEVYQEQTGG (K)</option>
          <option value="Val-&gt;Ala (V)">Val-&gt;Ala (V)</option>
          <option value="Val-&gt;Arg (V)">Val-&gt;Arg (V)</option>
          <option value="Val-&gt;Asn (V)">Val-&gt;Asn (V)</option>
          <option value="Val-&gt;Asp (V)">Val-&gt;Asp (V)</option>
          <option value="Val-&gt;Cys (V)">Val-&gt;Cys (V)</option>
          <option value="Val-&gt;Gln (V)">Val-&gt;Gln (V)</option>
          <option value="Val-&gt;Glu (V)">Val-&gt;Glu (V)</option>
          <option value="Val-&gt;Gly (V)">Val-&gt;Gly (V)</option>
          <option value="Val-&gt;His (V)">Val-&gt;His (V)</option>
          <option value="Val-&gt;Lys (V)">Val-&gt;Lys (V)</option>
          <option value="Val-&gt;Met (V)">Val-&gt;Met (V)</option>
          <option value="Val-&gt;Phe (V)">Val-&gt;Phe (V)</option>
          <option value="Val-&gt;Pro (V)">Val-&gt;Pro (V)</option>
          <option value="Val-&gt;Ser (V)">Val-&gt;Ser (V)</option>
          <option value="Val-&gt;Thr (V)">Val-&gt;Thr (V)</option>
          <option value="Val-&gt;Trp (V)">Val-&gt;Trp (V)</option>
          <option value="Val-&gt;Tyr (V)">Val-&gt;Tyr (V)</option>
          <option value="Val-&gt;Xle (V)">Val-&gt;Xle (V)</option>
          <option value="Withaferin (C)">Withaferin (C)</option>
          <option value="Xle-&gt;Ala (I)">Xle-&gt;Ala (I)</option>
          <option value="Xle-&gt;Ala (L)">Xle-&gt;Ala (L)</option>
          <option value="Xle-&gt;Arg (I)">Xle-&gt;Arg (I)</option>
          <option value="Xle-&gt;Arg (L)">Xle-&gt;Arg (L)</option>
          <option value="Xle-&gt;Asn (I)">Xle-&gt;Asn (I)</option>
          <option value="Xle-&gt;Asn (L)">Xle-&gt;Asn (L)</option>
          <option value="Xle-&gt;Asp (I)">Xle-&gt;Asp (I)</option>
          <option value="Xle-&gt;Asp (L)">Xle-&gt;Asp (L)</option>
          <option value="Xle-&gt;Cys (I)">Xle-&gt;Cys (I)</option>
          <option value="Xle-&gt;Cys (L)">Xle-&gt;Cys (L)</option>
          <option value="Xle-&gt;Gln (I)">Xle-&gt;Gln (I)</option>
          <option value="Xle-&gt;Gln (L)">Xle-&gt;Gln (L)</option>
          <option value="Xle-&gt;Glu (I)">Xle-&gt;Glu (I)</option>
          <option value="Xle-&gt;Glu (L)">Xle-&gt;Glu (L)</option>
          <option value="Xle-&gt;Gly (I)">Xle-&gt;Gly (I)</option>
          <option value="Xle-&gt;Gly (L)">Xle-&gt;Gly (L)</option>
          <option value="Xle-&gt;His (I)">Xle-&gt;His (I)</option>
          <option value="Xle-&gt;His (L)">Xle-&gt;His (L)</option>
          <option value="Xle-&gt;Lys (I)">Xle-&gt;Lys (I)</option>
          <option value="Xle-&gt;Lys (L)">Xle-&gt;Lys (L)</option>
          <option value="Xle-&gt;Met (I)">Xle-&gt;Met (I)</option>
          <option value="Xle-&gt;Met (L)">Xle-&gt;Met (L)</option>
          <option value="Xle-&gt;Phe (I)">Xle-&gt;Phe (I)</option>
          <option value="Xle-&gt;Phe (L)">Xle-&gt;Phe (L)</option>
          <option value="Xle-&gt;Pro (I)">Xle-&gt;Pro (I)</option>
          <option value="Xle-&gt;Pro (L)">Xle-&gt;Pro (L)</option>
          <option value="Xle-&gt;Ser (I)">Xle-&gt;Ser (I)</option>
          <option value="Xle-&gt;Ser (L)">Xle-&gt;Ser (L)</option>
          <option value="Xle-&gt;Thr (I)">Xle-&gt;Thr (I)</option>
          <option value="Xle-&gt;Thr (L)">Xle-&gt;Thr (L)</option>
          <option value="Xle-&gt;Trp (I)">Xle-&gt;Trp (I)</option>
          <option value="Xle-&gt;Trp (L)">Xle-&gt;Trp (L)</option>
          <option value="Xle-&gt;Tyr (I)">Xle-&gt;Tyr (I)</option>
          <option value="Xle-&gt;Tyr (L)">Xle-&gt;Tyr (L)</option>
          <option value="Xle-&gt;Val (I)">Xle-&gt;Val (I)</option>
          <option value="Xle-&gt;Val (L)">Xle-&gt;Val (L)</option>
          <option value="Xlink:B10621 (C)">Xlink:B10621 (C)</option>
          <option value="Xlink:DMP (K)">Xlink:DMP (K)</option>
          <option value="Xlink:DMP-de (K)">Xlink:DMP-de (K)</option>
          <option value="Xlink:DMP-s (K)">Xlink:DMP-s (K)</option>
          <option value="Xlink:DSS (K)">Xlink:DSS (K)</option>
          <option value="Xlink:DST (K)">Xlink:DST (K)</option>
          <option value="Xlink:DTSSP (K)">Xlink:DTSSP (K)</option>
          <option value="Xlink:EGS (K)">Xlink:EGS (K)</option>
          <option value="Xlink:EGScleaved (K)">Xlink:EGScleaved (K)</option>
          <option value="Xlink:SMCC (C)">Xlink:SMCC (C)</option>
          <option value="Xlink:SSD (K)">Xlink:SSD (K)</option>
          <option value="ZGB (K)">ZGB (K)</option>
          <option value="ZGB (N-term)">ZGB (N-term)</option>
          <option value="a-type-ion (C-term)">a-type-ion (C-term)</option>
          <option value="azole (C)">azole (C)</option>
          <option value="azole (S)">azole (S)</option>
          <option value="benzylguanidine (K)">benzylguanidine (K)</option>
          <option value="biotinAcrolein298 (C)">biotinAcrolein298 (C)</option>
          <option value="biotinAcrolein298 (H)">biotinAcrolein298 (H)</option>
          <option value="biotinAcrolein298 (K)">biotinAcrolein298 (K)</option>
          <option value="bisANS-sulfonates (K)">bisANS-sulfonates (K)</option>
          <option value="bisANS-sulfonates (S)">bisANS-sulfonates (S)</option>
          <option value="bisANS-sulfonates (T)">bisANS-sulfonates (T)</option>
          <option value="cGMP (C)">cGMP (C)</option>
          <option value="cGMP (S)">cGMP (S)</option>
          <option value="cGMP+RMP-loss (C)">cGMP+RMP-loss (C)</option>
          <option value="cGMP+RMP-loss (S)">cGMP+RMP-loss (S)</option>
          <option value="cysTMT (C)">cysTMT (C)</option>
          <option value="cysTMT6plex (C)">cysTMT6plex (C)</option>
          <option value="dHex (N)">dHex (N)</option>
          <option value="dHex (S)">dHex (S)</option>
          <option value="dHex (T)">dHex (T)</option>
          <option value="dHex(1)Hex(1) (S)">dHex(1)Hex(1) (S)</option>
          <option value="dHex(1)Hex(1) (T)">dHex(1)Hex(1) (T)</option>
          <option value="dHex(1)Hex(2) (S)">dHex(1)Hex(2) (S)</option>
          <option value="dHex(1)Hex(2) (T)">dHex(1)Hex(2) (T)</option>
          <option value="dHex(1)Hex(3) (S)">dHex(1)Hex(3) (S)</option>
          <option value="dHex(1)Hex(3) (T)">dHex(1)Hex(3) (T)</option>
          <option value="dHex(1)Hex(3)HexNAc(4) (N)">dHex(1)Hex(3)HexNAc(4) (N)</option>
          <option value="dHex(1)Hex(4) (S)">dHex(1)Hex(4) (S)</option>
          <option value="dHex(1)Hex(4) (T)">dHex(1)Hex(4) (T)</option>
          <option value="dHex(1)Hex(4)HexNAc(4) (N)">dHex(1)Hex(4)HexNAc(4) (N)</option>
          <option value="dHex(1)Hex(5) (S)">dHex(1)Hex(5) (S)</option>
          <option value="dHex(1)Hex(5) (T)">dHex(1)Hex(5) (T)</option>
          <option value="dHex(1)Hex(5)HexNAc(4) (N)">dHex(1)Hex(5)HexNAc(4) (N)</option>
          <option value="dHex(1)Hex(5)HexNAc(4)NeuAc(1) (N)">dHex(1)Hex(5)HexNAc(4)NeuAc(1) (N)</option>
          <option value="dHex(1)Hex(5)HexNAc(4)NeuAc(2) (N)">dHex(1)Hex(5)HexNAc(4)NeuAc(2) (N)</option>
          <option value="dHex(1)Hex(6) (S)">dHex(1)Hex(6) (S)</option>
          <option value="dHex(1)Hex(6) (T)">dHex(1)Hex(6) (T)</option>
          <option value="dNIC (K)">dNIC (K)</option>
          <option value="dNIC (N-term)">dNIC (N-term)</option>
          <option value="dichlorination (C)">dichlorination (C)</option>
          <option value="dichlorination (Y)">dichlorination (Y)</option>
          <option value="ethylamino (S)">ethylamino (S)</option>
          <option value="ethylamino (T)">ethylamino (T)</option>
          <option value="ethylsulfonylethyl (C)">ethylsulfonylethyl (C)</option>
          <option value="ethylsulfonylethyl (H)">ethylsulfonylethyl (H)</option>
          <option value="ethylsulfonylethyl (K)">ethylsulfonylethyl (K)</option>
          <option value="glucosone (R)">glucosone (R)</option>
          <option value="glycidamide (K)">glycidamide (K)</option>
          <option value="glycidamide (N-term)">glycidamide (N-term)</option>
          <option value="iTRAQ4plex (H)">iTRAQ4plex (H)</option>
          <option value="iTRAQ4plex (K)">iTRAQ4plex (K)</option>
          <option value="iTRAQ4plex (N-term)">iTRAQ4plex (N-term)</option>
          <option value="iTRAQ4plex (S)">iTRAQ4plex (S)</option>
          <option value="iTRAQ4plex (T)">iTRAQ4plex (T)</option>
          <option value="iTRAQ4plex (Y)">iTRAQ4plex (Y)</option>
          <option value="iTRAQ4plex114 (K)">iTRAQ4plex114 (K)</option>
          <option value="iTRAQ4plex114 (N-term)">iTRAQ4plex114 (N-term)</option>
          <option value="iTRAQ4plex114 (Y)">iTRAQ4plex114 (Y)</option>
          <option value="iTRAQ4plex115 (K)">iTRAQ4plex115 (K)</option>
          <option value="iTRAQ4plex115 (N-term)">iTRAQ4plex115 (N-term)</option>
          <option value="iTRAQ4plex115 (Y)">iTRAQ4plex115 (Y)</option>
          <option value="iTRAQ8plex (H)">iTRAQ8plex (H)</option>
          <option value="iTRAQ8plex (K)">iTRAQ8plex (K)</option>
          <option value="iTRAQ8plex (N-term)">iTRAQ8plex (N-term)</option>
          <option value="iTRAQ8plex (S)">iTRAQ8plex (S)</option>
          <option value="iTRAQ8plex (T)">iTRAQ8plex (T)</option>
          <option value="iTRAQ8plex (Y)">iTRAQ8plex (Y)</option>
          <option value="iTRAQ8plex:13C(6)15N(2) (K)">iTRAQ8plex:13C(6)15N(2) (K)</option>
          <option value="iTRAQ8plex:13C(6)15N(2) (N-term)">iTRAQ8plex:13C(6)15N(2) (N-term)</option>
          <option value="iTRAQ8plex:13C(6)15N(2) (Y)">iTRAQ8plex:13C(6)15N(2) (Y)</option>
          <option value="iodoTMT (C)">iodoTMT (C)</option>
          <option value="iodoTMT (D)">iodoTMT (D)</option>
          <option value="iodoTMT (E)">iodoTMT (E)</option>
          <option value="iodoTMT (H)">iodoTMT (H)</option>
          <option value="iodoTMT (K)">iodoTMT (K)</option>
          <option value="iodoTMT6plex (C)">iodoTMT6plex (C)</option>
          <option value="iodoTMT6plex (D)">iodoTMT6plex (D)</option>
          <option value="iodoTMT6plex (E)">iodoTMT6plex (E)</option>
          <option value="iodoTMT6plex (H)">iodoTMT6plex (H)</option>
          <option value="iodoTMT6plex (K)">iodoTMT6plex (K)</option>
          <option value="lapachenole (C)">lapachenole (C)</option>
          <option value="mTRAQ (H)">mTRAQ (H)</option>
          <option value="mTRAQ (K)">mTRAQ (K)</option>
          <option value="mTRAQ (N-term)">mTRAQ (N-term)</option>
          <option value="mTRAQ (S)">mTRAQ (S)</option>
          <option value="mTRAQ (T)">mTRAQ (T)</option>
          <option value="mTRAQ (Y)">mTRAQ (Y)</option>
          <option value="mTRAQ:13C(3)15N(1) (H)">mTRAQ:13C(3)15N(1) (H)</option>
          <option value="mTRAQ:13C(3)15N(1) (K)">mTRAQ:13C(3)15N(1) (K)</option>
          <option value="mTRAQ:13C(3)15N(1) (N-term)">mTRAQ:13C(3)15N(1) (N-term)</option>
          <option value="mTRAQ:13C(3)15N(1) (S)">mTRAQ:13C(3)15N(1) (S)</option>
          <option value="mTRAQ:13C(3)15N(1) (T)">mTRAQ:13C(3)15N(1) (T)</option>
          <option value="mTRAQ:13C(3)15N(1) (Y)">mTRAQ:13C(3)15N(1) (Y)</option>
          <option value="mTRAQ:13C(6)15N(2) (H)">mTRAQ:13C(6)15N(2) (H)</option>
          <option value="mTRAQ:13C(6)15N(2) (K)">mTRAQ:13C(6)15N(2) (K)</option>
          <option value="mTRAQ:13C(6)15N(2) (N-term)">mTRAQ:13C(6)15N(2) (N-term)</option>
          <option value="mTRAQ:13C(6)15N(2) (S)">mTRAQ:13C(6)15N(2) (S)</option>
          <option value="mTRAQ:13C(6)15N(2) (T)">mTRAQ:13C(6)15N(2) (T)</option>
          <option value="mTRAQ:13C(6)15N(2) (Y)">mTRAQ:13C(6)15N(2) (Y)</option>
          <option value="maleimide (C)">maleimide (C)</option>
          <option value="maleimide (K)">maleimide (K)</option>
          <option value="maleimide3 (C)">maleimide3 (C)</option>
          <option value="maleimide3 (K)">maleimide3 (K)</option>
          <option value="maleimide5 (C)">maleimide5 (C)</option>
          <option value="maleimide5 (K)">maleimide5 (K)</option>
          <option value="methylsulfonylethyl (C)">methylsulfonylethyl (C)</option>
          <option value="methylsulfonylethyl (H)">methylsulfonylethyl (H)</option>
          <option value="methylsulfonylethyl (K)">methylsulfonylethyl (K)</option>
          <option value="phenylsulfonylethyl (C)">phenylsulfonylethyl (C)</option>
          <option value="phosphoRibosyl (D)">phosphoRibosyl (D)</option>
          <option value="phosphoRibosyl (E)">phosphoRibosyl (E)</option>
          <option value="phosphoRibosyl (R)">phosphoRibosyl (R)</option>
          <option value="probiotinhydrazide (P)">probiotinhydrazide (P)</option>
          <option value="pupylation (K)">pupylation (K)</option>
          <option value="pyrophospho (S)">pyrophospho (S)</option>
          <option value="pyrophospho (T)">pyrophospho (T)</option>
          <option value="sulfo+amino (Y)">sulfo+amino (Y)</option>
          <option value="thioacylPA (K)">thioacylPA (K)</option>
          <option value="trifluoro (L)">trifluoro (L)</option>
        </param>
      </repeat>
      <param help="(-v) " label="number of missed cleavages allowed" name="param_v" type="integer" value="1"/>
      <param help="(-enzyme) " label="The enzyme used for peptide digestion" name="param_enzyme" optional="True" type="select" value="Trypsin">
        <option value="Trypsin">Trypsin</option>
        <option value="no cleavage">no cleavage</option>
        <option value="CNBr">CNBr</option>
        <option value="Asp-N_ambic">Asp-N_ambic</option>
        <option value="Chymotrypsin">Chymotrypsin</option>
        <option value="PepsinA">PepsinA</option>
        <option value="Trypsin/P">Trypsin/P</option>
        <option value="unspecific cleavage">unspecific cleavage</option>
        <option value="Lys-C/P">Lys-C/P</option>
        <option value="glutamyl endopeptidase">glutamyl endopeptidase</option>
        <option value="TrypChymo">TrypChymo</option>
        <option value="Formic_acid">Formic_acid</option>
        <option value="Lys-C">Lys-C</option>
        <option value="Asp-N">Asp-N</option>
        <option value="Arg-C">Arg-C</option>
      </param>
      <param help="(-hl) Note: even when set to 1 OMSSA may report multiple hits with different charge states" label="maximum number of hits retained for one spectrum" name="param_hl" type="integer" value="30"/>
      <param help="(-he) e.g., he=1), this will effectively introduce FDR filtering. Thus, allowing a less stringent FDR during post-processing will nevertheless return the (better) FDR introduced here, since mediocre hits are not even reported" label="the maximum e-value allowed in the hit list. If you set this parameter too small (" name="param_he" type="float" value="1000.0"/>
      <expand macro="advanced_options">
        <param help="(-pc) " label="The number of pseudocounts to add to each precursor mass bin" name="param_pc" type="integer" value="1"/>
        <param help="(-hs) " label="the minimum number of m/z values a spectrum must have to be searched" name="param_hs" type="integer" value="4"/>
        <param help="(-tez) " label="scaling of precursor mass tolerance with charge (0 = none, 1= linear)" name="param_tez" type="integer" value="1"/>
        <param help="(-tom) " label="product ion search type, with 0 = monoisotopic, 1 = average, 2 = monoisotopic N15, 3 = exact" name="param_tom" type="integer" value="0"/>
        <param help="(-tem) " label="precursor ion search type, with 0 = monoisotopic, 1 = average, 2 = monoisotopic N15, 3 = exact" name="param_tem" type="integer" value="0"/>
        <param help="(-tex) " label="threshold in Da above which the mass of a neutron should be added in an exact mass search" name="param_tex" type="float" value="1446.94"/>
        <param help="(-zt) " label="minimum precursor charge to start considering multiply charged products" name="param_zt" type="integer" value="3"/>
        <param help="(-z1) " label="the fraction of peaks below the precursor used to determine if the spectrum is charge +1" name="param_z1" type="float" value="0.95"/>
        <param help="(-zc) " label="should charge +1 be determined algorithmically (1=yes)" name="param_zc" type="integer" value="1"/>
        <param help="(-zcc) (1=believe the input file,2=use the specified range)" label="how should precursor charges be determined?" name="param_zcc" type="integer" value="2"/>
        <param help="(-zoh) " label="set the maximum product charge to search" name="param_zoh" type="integer" value="2"/>
        <param help="(-no) " label="minimum size of peptides for no-enzyme and semi-tryptic searches" name="param_no" type="integer" value="4"/>
        <param help="(-nox) " label="maximum size of peptides for no-enzyme and semi-tryptic searches" name="param_nox" type="integer" value="40"/>
        <param help="(-i) " label="comma delimited list of id numbers of ions to search" name="param_i" size="30" type="text" value="1,4">
          <sanitizer>
            <valid initial="string.printable">
              <remove value="'"/>
              <remove value="&quot;"/>
            </valid>
          </sanitizer>
        </param>
        <param help="(-sp) " label="number of product ions to search" name="param_sp" type="integer" value="100"/>
        <param help="(-sb1) e.g. b1) product ions be searched (1 = no, 0 = yes)" label="should first forward (" name="param_sb1" type="integer" value="1"/>
        <param help="(-sct) e.g. y1) be searched (1 = no, 0 = yes)" label="should c terminus ions (" name="param_sct" type="integer" value="0"/>
        <param help="(-x)  This is the default)" label="comma delimited list of NCBI taxonomy ids to search (0 = all" name="param_x" size="30" type="text" value="0">
          <sanitizer>
            <valid initial="string.printable">
              <remove value="'"/>
              <remove value="&quot;"/>
            </valid>
          </sanitizer>
        </param>
        <param help="(-hm) " label="the minimum number of m/z matches a sequence library peptide must have for the hit to the peptide to be recorded" name="param_hm" type="integer" value="2"/>
        <param help="(-ht) " label="number of m/z values corresponding to the most intense peaks that must include one match to the theoretical peptide" name="param_ht" type="integer" value="6"/>
        <param help="(-mm) " label="the maximum number of mass ladders to generate per database peptide" name="param_mm" type="integer" value="128"/>
        <param checked="false" falsevalue="" help="(-mnm) " label="n-term methionine should not be cleaved" name="param_mnm" optional="True" truevalue="-mnm" type="boolean"/>
        <param help="(-is) " label="evalue threshold to include a sequence in the iterative search, 0 = all" name="param_is" type="float" value="0.0"/>
        <param help="(-ir) " label="evalue threshold to replace a hit, 0 = only if bette" name="param_ir" type="float" value="0.0"/>
        <param help="(-ii) " label="evalue threshold to iteratively search a spectrum again, 0 = always" name="param_ii" type="float" value="0.0"/>
        <param help="(-chunk_size) Chunks with more than 30k spectra will likely cause memory allocation issues with 32bit OMSSA versions (which is usually the case on Windows). To disable chunking (i.e. submit all spectra in one big chunk), set it to '0'" label="Number of spectra to submit in one chunk to OMSSA" name="param_chunk_size" type="integer" value="0"/>
        <param checked="false" falsevalue="" help="(-force) " label="Overwrite tool specific checks" name="param_force" optional="True" truevalue="-force" type="boolean"/>
      </expand>
    </inputs>
    <outputs>
      <data format="xml" name="param_out"/>
    </outputs>
    <help>Annotates MS/MS spectra using OMSSA.


For more information, visit http://ftp.mi.fu-berlin.de/OpenMS/release-documentation/html/TOPP_OMSSAAdapter.html</help>
  </tool>