{"id":656,"sequence":"GFPGADGVAGPK","proforma":"[Oxidation]?GFPGADGVAGPK","modifications":[{"name":"Oxidation","count":1,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1087.5298233337,"mh":1088.5371,"url":"https://www.msipep.com/peptide/656/"}