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Enzymtc Degradation of ß-Casein by a Snake Venom Preparation

Eastern Regional Research Laboratory,¹ Philadelphia 18, Pennsylvania

ABSTRACT

The action of a snake venom preparation from Crotalus adamanteus on ß-casein has been studied. The action resulted in the formation of a turbidity, which was measured with time in the spectrophotometer. The effects of temperature, metal ions, pH, and ionic nature of the medium have been observed. The reaction appears to be proteolytic in nature, being accompanied by an increase in ninhydrin-positive material and resulting in the formation of at least four different fractions from ß-casein. The proteolytic activity always preceded the precipitate formation. The material precipitated during the reaction was essentially phosphorus-free and comprised 20–30% of the original ß-easein.

¹ Eastern Utilization Research and Development Division, Agricultural Research Service, U. S. Department of Agriculture.