EC 1.7.3.3 urate:oxygen oxidoreductase uric acid oxidase urate oxidase Recombinant from a eukaryote. In 3.2 M ammonium sulphate. May be used in the measurement of uric acid. Specific activity: ~ 2.5 U/mg (25oC, pH 8.5 on uric acid). Stability: > 2 years at 4oC