Studies on the plasma phosphatase of normal and rachitic chicks. 3. The assay of antirachitic preparations by a method based on the determination of plasma phosphatase activity

I. MOTZOK I950 trations of H+ and of substrate, maximum phosphatase activity was obtained at a concentration of 0 005M-magnesium chloride with the enzymes of bone, kidney and liver, and a concentration of 0-01 M with the intestinal phosphatase.