view OMSSAAdapter.xml @ 0:3d84209d3178 draft

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author bgruening
date Fri, 10 Oct 2014 18:20:03 -0400
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children 6ead64a594bd
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<?xml version='1.0' encoding='UTF-8'?>
<tool id="OMSSAAdapter" name="OMSSAAdapter" version="1.12.0">
  <description>Annotates MS/MS spectra using OMSSA.</description>
  <macros>
    <token name="@EXECUTABLE@">OMSSAAdapter</token>
    <import>macros.xml</import>
  </macros>
  <expand macro="stdio"/>
  <expand macro="requirements"/>
  <command>OMSSAAdapter

-in ${param_in}
-out ${param_out}
-precursor_mass_tolerance ${param_precursor_mass_tolerance}
${param_precursor_mass_tolerance_unit_ppm}
-fragment_mass_tolerance ${param_fragment_mass_tolerance}
-database ${param_database}
-min_precursor_charge ${param_min_precursor_charge}
-max_precursor_charge ${param_max_precursor_charge}
-fixed_modifications ${param_fixed_modifications}
-variable_modifications ${param_variable_modifications}
-omssa_executable ${param_omssa_executable}
-v ${param_v}
-e ${param_e}
-hl ${param_hl}
-he ${param_he}
-threads \${GALAXY_SLOTS:-24} 
#if $adv_opts.adv_opts_selector=='advanced':
    -pc ${adv_opts.param_pc}
    -hs ${adv_opts.param_hs}
    -tez ${adv_opts.param_tez}
    -tom ${adv_opts.param_tom}
    -tem ${adv_opts.param_tem}
    -tex ${adv_opts.param_tex}
    -zt ${adv_opts.param_zt}
    -z1 ${adv_opts.param_z1}
    -zc ${adv_opts.param_zc}
    -zcc ${adv_opts.param_zcc}
    -zoh ${adv_opts.param_zoh}
    -no ${adv_opts.param_no}
    -nox ${adv_opts.param_nox}
    -i ${adv_opts.param_i}
    -sp ${adv_opts.param_sp}
    -sb1 ${adv_opts.param_sb1}
    -sct ${adv_opts.param_sct}
    -x ${adv_opts.param_x}
    -hm ${adv_opts.param_hm}
    -ht ${adv_opts.param_ht}
    -mm ${adv_opts.param_mm}
    ${adv_opts.param_mnm}
    -is ${adv_opts.param_is}
    -ir ${adv_opts.param_ir}
    -ii ${adv_opts.param_ii}
    -chunk_size ${adv_opts.param_chunk_size}
#end if
</command>
  <inputs>
    <param name="param_in" type="data" format="mzML" optional="False" label="Input file " help="(-in)"/>
    <param name="param_precursor_mass_tolerance" type="float" value="1.5" label="Precursor mass tolerance (Default: Dalton)" help="(-precursor_mass_tolerance)"/>
    <param name="param_precursor_mass_tolerance_unit_ppm" type="boolean" truevalue="-precursor_mass_tolerance_unit_ppm true" falsevalue="-precursor_mass_tolerance_unit_ppm false" checked="false" optional="True" label="If this flag is set, ppm is used as precursor mass tolerance unit" help="(-precursor_mass_tolerance_unit_ppm)"/>
    <param name="param_fragment_mass_tolerance" type="float" value="0.3" label="Fragment mass error in Dalton" help="(-fragment_mass_tolerance)"/>
    <param name="param_database" type="data" format="fasta" optional="False" label="NCBI formatted FASTA files. The .psq filename should be given, 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'" help="(-database)"/>
    <param name="param_min_precursor_charge" type="integer" value="1" label="Minimum precursor ion charge" help="(-min_precursor_charge)"/>
    <param name="param_max_precursor_charge" type="integer" value="3" label="Maximum precursor ion charge" help="(-max_precursor_charge)"/>
    <param name="param_fixed_modifications" type="select" optional="True" label="Fixed modifications, specified using UniMod (www.unimod.org) terms, e.g. 'Carbamidomethyl (C)' or 'Oxidation (M)'" help="(-fixed_modifications)">
      <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>
    <param name="param_variable_modifications" type="select" optional="True" label="Variable modifications, specified using UniMod (www.unimod.org) terms, e.g. 'Carbamidomethyl (C)' or 'Oxidation (M)'" help="(-variable_modifications)">
      <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>
    <param name="param_omssa_executable" type="data" format="data" value="omssacl" label="The 'omssacl' executable of the OMSSA installation" help="(-omssa_executable)"/>
    <param name="param_v" type="integer" value="1" label="number of missed cleavages allowed" help="(-v)"/>
    <param name="param_e" type="integer" value="0" label="id number of enzyme to use (0 (i.e. trypsin) is the default, 17 would be no enzyme (i.e. unspecific digestion). Please refer to 'omssacl -el' for a listing." help="(-e)"/>
    <param name="param_hl" type="integer" value="30" label="maximum number of hits retained for one spectrum. Note: even when set to 1 OMSSA may report multiple hits with different charge states" help="(-hl)"/>
    <param name="param_he" type="float" value="1000.0" label="the maximum e-value allowed in the hit list. If you set this parameter too small (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." help="(-he)"/>
    <expand macro="advanced_options">
      <param name="param_pc" type="integer" value="1" label="The number of pseudocounts to add to each precursor mass bin" help="(-pc)"/>
      <param name="param_hs" type="integer" value="4" label="the minimum number of m/z values a spectrum must have to be searched" help="(-hs)"/>
      <param name="param_tez" type="integer" value="1" label="scaling of precursor mass tolerance with charge (0 = none, 1= linear)" help="(-tez)"/>
      <param name="param_tom" type="integer" value="0" label="product ion search type, with 0 = monoisotopic, 1 = average, 2 = monoisotopic N15, 3 = exact" help="(-tom)"/>
      <param name="param_tem" type="integer" value="0" label="precursor ion search type, with 0 = monoisotopic, 1 = average, 2 = monoisotopic N15, 3 = exact" help="(-tem)"/>
      <param name="param_tex" type="float" value="1446.94" label="threshold in Da above which the mass of a neutron should be added in an exact mass search" help="(-tex)"/>
      <param name="param_zt" type="integer" value="3" label="minimum precursor charge to start considering multiply charged products" help="(-zt)"/>
      <param name="param_z1" type="float" value="0.95" label="the fraction of peaks below the precursor used to determine if the spectrum is charge +1" help="(-z1)"/>
      <param name="param_zc" type="integer" value="1" label="should charge +1 be determined algorithmically (1=yes)" help="(-zc)"/>
      <param name="param_zcc" type="integer" value="2" label="how should precursor charges be determined? (1=believe the input file,2=use the specified range)" help="(-zcc)"/>
      <param name="param_zoh" type="integer" value="2" label="set the maximum product charge to search" help="(-zoh)"/>
      <param name="param_no" type="integer" value="4" label="minimum size of peptides for no-enzyme and semi-tryptic searches" help="(-no)"/>
      <param name="param_nox" type="integer" value="40" label="maximum size of peptides for no-enzyme and semi-tryptic searches" help="(-nox)"/>
      <param name="param_i" type="text" size="20" value="1,4" label="comma delimited list of id numbers of ions to search" help="(-i)"/>
      <param name="param_sp" type="integer" value="100" label="number of product ions to search" help="(-sp)"/>
      <param name="param_sb1" type="integer" value="1" label="should first forward (e.g. b1) product ions be searched (1 = no, 0 = yes)" help="(-sb1)"/>
      <param name="param_sct" type="integer" value="0" label="should c terminus ions (e.g. y1) be searched (1 = no, 0 = yes)" help="(-sct)"/>
      <param name="param_x" type="text" size="20" value="0" label="comma delimited list of NCBI taxonomy ids to search (0 = all.  This is the default)" help="(-x)"/>
      <param name="param_hm" type="integer" value="2" label="the minimum number of m/z matches a sequence library peptide must have for the hit to the peptide to be recorded" help="(-hm)"/>
      <param name="param_ht" type="integer" value="6" label="number of m/z values corresponding to the most intense peaks that must include one match to the theoretical peptide" help="(-ht)"/>
      <param name="param_mm" type="integer" value="128" label="the maximum number of mass ladders to generate per database peptide" help="(-mm)"/>
      <param name="param_mnm" type="boolean" truevalue="-mnm true" falsevalue="-mnm false" checked="false" optional="True" label="n-term methionine should not be cleaved" help="(-mnm)"/>
      <param name="param_is" type="float" value="0.0" label="evalue threshold to include a sequence in the iterative search, 0 = all" help="(-is)"/>
      <param name="param_ir" type="float" value="0.0" label="evalue threshold to replace a hit, 0 = only if better" help="(-ir)"/>
      <param name="param_ii" type="float" value="0.0" label="evalue threshold to iteratively search a spectrum again, 0 = always" help="(-ii)"/>
      <param name="param_chunk_size" type="integer" value="0" label="Number of spectra to submit in one chunk to OMSSA. 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'." help="(-chunk_size)"/>
    </expand>
  </inputs>
  <outputs>
    <data name="param_out" label="Output file " format="idXML"/>
  </outputs>
  <help>**What it does**

Annotates MS/MS spectra using OMSSA.


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

@REFERENCES@
</help>
</tool>