xanthine oxidase activity Reactome:REACT_113063 Reactome:REACT_624 UM-BBD_enzymeID:e0781 Reactome:REACT_114235 Reactome:REACT_98626 molecular_function Reactome:REACT_105088 Reactome:REACT_104232 xanthine oxidoreductase activity Reactome:REACT_115203 Schardinger enzyme activity Reactome:REACT_87777 Reactome:REACT_79038 GO:0004855 Reactome:REACT_78983 Reactome:REACT_113574 Reactome:REACT_29610 xanthine:xanthine oxidase activity xanthine:O(2) oxidoreductase activity Reactome:REACT_83908 Reactome:REACT_33683 Reactome:REACT_83465 Catalysis of the reaction: xanthine + H2O + O2 = urate + hydrogen peroxide. Reactome:REACT_401 Reactome:REACT_113246 Reactome:REACT_101220 xanthine:O2 oxidoreductase activity Reactome:REACT_104374 schardinger enzyme Reactome:REACT_89451 EC:1.17.3.2 Reactome:REACT_32882 Reactome:REACT_83556 Reactome:REACT_93758 Reactome:REACT_78184 MetaCyc:XANTHINE-OXIDASE-RXN Reactome:REACT_86820 RHEA:21135 Reactome:REACT_91142 Reactome:REACT_34162 xanthine:oxygen oxidoreductase activity Reactome:REACT_114723 Reactome:REACT_103198 Reactome:REACT_84414 hypoxanthine-xanthine oxidase activity oxidoreductase activity, acting on CH or CH2 groups, oxygen as acceptor