{"id":682,"sequence":"GSAGPPGATGFPGAAGR","proforma":"[Oxidation]^2?GSAGPPGATGFPGAAGR","modifications":[{"name":"Oxidation","count":2,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1458.6851547737,"mh":1459.69243,"url":"https://msipep.com/peptide/682/"}