* En « enzyme activity unit » (EAU) svarer til den enzymaktivitet, der kan omdanne 1 µmol urinsyre til allantoin per minut under følgende forhold: +30°C±1°C TEA pH 8, 9 buffer.
*One enzyme activity unit (EAU) corresponds to the enzyme activity that converts 1 µmol of uric acid into allantoin per minute under the operating conditions described: +30 °C ± 1 °C TEA pH 8.9 buffer.