{"id":1112,"sequence":"VGPPGPSGNAGPPGPPGPAGK","proforma":"[Oxidation]^3?VGPPGPSGNAGPPGPPGPAGK","modifications":[{"name":"Oxidation","count":3,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1811.8802257437,"mh":1812.8875,"url":"https://msipep.com/peptide/1112/"}