part of Oxidation/Reduction Purine metabolism Xanthine + H2O + O2 => Uric acid + H2O2( EC:1.17.3.2 ) EC:1.17.3.2 IEV:0003268 IMR:0200029 IMR:0200217 IMR:0200357 IMR:0200439 IMR:0200487 KEGG:R02107 KEGG:map00230 event