 Xanthine oxidase in IUBMB Enzyme Nomenclature

Primary nomenclature entry EC1.17.3.2, Reaction and Comments. Xanthine+water+oxygen yields urate+hydrogen peroxide in the stated overall reaction. Comments also describe superoxide production under some conditions and mammalian dehydrogenase/oxidase interconversion; no claim that peroxide is the only possible oxygen-reduction product.