{"id":1084,"sequence":"TGPPGPSGISGPPGPPGPAGK","proforma":"[Oxidation]^4?TGPPGPSGISGPPGPPGPAGK","modifications":[{"name":"Oxidation","count":4,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1844.8904560837,"mh":1845.89773,"url":"https://msipep.com/peptide/1084/"}