{"id":650,"sequence":"GEPGPVGVQGPPGPAGEEGKR","proforma":"[Oxidation]^2?GEPGPVGVQGPPGPAGEEGKR","modifications":[{"name":"Oxidation","count":2,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":2002.9708316537,"mh":2003.97811,"url":"https://msipep.com/peptide/650/"}