{"id":882,"sequence":"RCPNHELSR","proforma":"[Oxidation]?RCPNHELSR","modifications":[{"name":"Oxidation","count":1,"n_term":false,"unimod":35,"position":null,"residues":"HW"}],"mods_ambiguous":false,"neutral_mass":1126.5301747737,"mh":1127.53745,"url":"https://www.msipep.com/peptide/882/"}