{"id":1138,"sequence":"GFPGADGVAGPKGPAGER","proforma":"[Oxidation]?GFPGADGVAGPKGPAGER","modifications":[{"name":"Oxidation","count":1,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1654.8063325337,"mh":1655.81361,"url":"https://msipep.com/peptide/1138/"}