EC 3.5.1.2 Recombinant from E. coli. In 2.5 M lithium sulphate. Specific activity: 1265 U/mg (25oC, pH 4.9); 1791 U/mg (37oC, pH 4.9). Contaminants: NADH oxidase, NADPH oxidase < 0.001 %. Free ammonium < 0.001 mg/Unit. Stable at 4oC for > 2 years.
