title: A simple method for determining low levels of urinary oxypurine.
mesh_terms: D006801:Humans; D006863:Hydrogen-Ion Concentration; D008722:Methods; D011687:Purines / Q000652:urine*; D013053:Spectrophotometry; D014503:Urate Oxidase; D014527:Uric Acid / Q000652:urine; D014969:Xanthine Oxidase; D014970:Xanthines / Q000652:urine
chemical_list: D011687:Purines; D014970:Xanthines; D014527:Uric Acid; D014969:Xanthine Oxidase; D014503:Urate Oxidase