{"id":919,"sequence":"RGPNGEAGSAGPPGPPGLR","proforma":"[Oxidation]^2?RGPNGEAGSAGPPGPPGLR","modifications":[{"name":"Oxidation","count":2,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1774.8710580537002,"mh":1775.87833,"url":"https://www.msipep.com/peptide/919/"}