{"id":649,"sequence":"GEPGPTGLPGPPGER","proforma":"[Oxidation]^3?GEPGPTGLPGPPGER","modifications":[{"name":"Oxidation","count":3,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1464.6844860537,"mh":1465.69176,"url":"https://www.msipep.com/peptide/649/"}