{"id":648,"sequence":"GENGVVGPTGPVGAAGPAGPNGPPGPAGSR","proforma":"[Oxidation]?GENGVVGPTGPVGAAGPAGPNGPPGPAGSR","modifications":[{"name":"Oxidation","count":1,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":2566.2524262237002,"mh":2567.2597,"url":"https://msipep.com/peptide/648/"}