{"id":577,"sequence":"AGEDGHPGKPGRPGER","proforma":"[Oxidation]^3?AGEDGHPGKPGRPGER","modifications":[{"name":"Oxidation","count":3,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1663.7662586337,"mh":1664.77354,"url":"https://www.msipep.com/peptide/577/"}