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| Xanthine Dehydrogenase Purine Hydroxylase I | Dehydrogenase, Xanthine | Hydroxylase I, Purine | I, Purine Hydroxylase An enzyme that catalyzes the oxidation of xanthine in the presence of NAD+ to form urate and NADH. It acts also on a variety of other purines and aldehydes. EC 1.1.1.204. |