Description General description Native alkaline phosphatase from E. coli. A dimeric zinc- and magnesium-containing protein. A non-specific phosphomonoesterase with a pI of 7.5. Packaging 100 u in Plastic ampoule Warning Toxicity: Standard Handling (A) Unit Definition One unit is defined as the amount of enzyme that will hydrolyze 1 µmol of pNPP per min at 25°C in Tris-HCl, pH 8.0. Physical form In 50 mM Tris-HCl, 50% glycerol, pH 7.5. Other Notes Reid, T.W. and Willson, I.B. 1971. Enzymes4, 383.