{"id":690,"sequence":"GVVGLPGQR","proforma":"[Oxidation]?GVVGLPGQR","modifications":[{"name":"Oxidation","count":1,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":897.5032146537,"mh":898.51049,"url":"https://msipep.com/peptide/690/"}