EC 2.7.1.12 Recombinant from E. coli. In 3.2 M ammonium sulphate. Specific activity: 31.8 U/mg (25oC, pH 8.0). Contaminants: ATPase, NADH oxidase, NADPH oxidase < 0.001 %. Stable at 4oC for > 2 years.
