Phosphatase, Alkaline from Escherichia coli, buffered aqueous glycerol solution, 20-50 units/mg protein (in glycine buffer)

Phospholipase C from Clostridium perfringens (C. welchii), Type I, lyophilized powder, 10-50 units/mg protein

Xanthine Oxidase from bovine milk, lyophilized powder, 0.4-1.0 units/mg protein