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xanthine oxidase |
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xanthine oxidase /xan·thine ox·i·dase/ (ok´sĭ-dās) a flavoprotein enzyme that catalyzes the oxidation of hypoxanthine to xanthine and then to uric acid, the final steps in the degradation of purines; deficiency, an autosomal recessive trait, causes xanthinuria. xanthine a purine compound found in most bodily tissues and fluids; it is a precursor of uric acid. Xanthine compounds such as theophylline have diuretic properties. xanthine calculi see xanthine urolith. dimethyl xanthine theobromine. xanthine oxidase key enzyme in the pathway for purine breakdown. Catalyzes the conversion of hypoxanthine to xanthine and then to uric acid. Generates hydrogen peroxide, which can be a generator of free radicals in biological systems through reactions with superoxide ions. trimethyl xanthine caffeine. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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