{"id":1137,"sequence":"GDGGPPGMTGFPGAAGR","proforma":"[Oxidation]^2?GDGGPPGMTGFPGAAGR","modifications":[{"name":"Oxidation","count":2,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1532.6677904437001,"mh":1533.67507,"url":"https://www.msipep.com/peptide/1137/"}