{"id":1139,"sequence":"GLHGEFGLPGPAGPR","proforma":"[Oxidation]^2?GLHGEFGLPGPAGPR","modifications":[{"name":"Oxidation","count":2,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":1492.7422757137,"mh":1493.74955,"url":"https://msipep.com/peptide/1139/"}