{"id":684,"sequence":"GSPGEAGRPGEAGLPGAK","proforma":"[Oxidation]^3?GSPGEAGRPGEAGLPGAK","modifications":[{"name":"Oxidation","count":3,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1654.7910764037001,"mh":1655.79835,"url":"https://msipep.com/peptide/684/"}