Origins of serum alkaline phosphatase

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RESUMO

A very rapid method of agar gel electrophoresis on glass slides, together with a superior visualization technique employing simultaneous coupling of a hydrolysed naphthol substrate, have been developed for the identification of the tissues of origin of serum alkaline phosphatase. Combined with L-phenylalanine inhibition, specific for the intestinal enzyme, and heat inactivation, specific for the placental enzyme, the heterogeneity of serum alkaline phosphatase has been demonstrated. Normal adult serum contains predominantly liver-type alkaline phosphatase with a small but variable quantity of intestinal enzyme, and little or no bone enzyme.

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