Phosphoamidase Activity of some Proteolytic Enzymes and Rennin.

Abstract
Phosphoamidase activity (I) of rennin far surpassed that of pepsin and trypsin. (Li, Acta Chem. Scand, 4: 610. 1950). That I of trypsin was not due to an impurity, was apparent since I in the absence of soybean inhibitor was 11.8% and in its presence 1.3%. The authors suggested that initial rennin activity on casein is a splitting of the P-N bonds. The equality of the ratio between coagulating and I in the case of crystalline rennin, pepsin and chymotrypsin supported this view.

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