SEARCH Articles Figures Tables Molybdenum enzymes xanthine oxidase Molybdenum hydroxylase xanthine oxidase Molybdenum oxidases Oxidases xanthine oxidase Xanthin Xanthine Xanthine oxidase families molybdenum hydroxylase Xanthine oxidase families molybdenum hydroxylases Xanthine oxidase molybdenum center Xanthine oxidase molybdenum cofactor Xanthine oxidase molybdenum complex center Xanthins