{"id":659,"sequence":"GFSGLQGPPGPPGSPGEQGPSGASGPAGPR","proforma":"[Oxidation]^3?GFSGLQGPPGPPGSPGEQGPSGASGPAGPR","modifications":[{"name":"Oxidation","count":3,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":2704.2477347937,"mh":2705.25501,"url":"https://www.msipep.com/peptide/659/"}