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n. Any of a group of simple proteins found in fish sperm that are strongly basic, are soluble in water, are not coagulated by heat, and yield chiefly arginine upon hydrolysis. In purified form, they are used in a long-acting formulation of insulin and to neutralize the anticoagulant effects of heparin.

n. any of a class of proteins, rich in arginine, found in the sperm of fish; used medicinally to control the action of insulin

n. A member of a group which comprises the simplest albumins known to occur in the animal body.

n. a simple protein found in fish sperm; rich in arginine; simpler in composition than globulin or albumin; counteracts the anticoagulant effect of heparin

"After two years in their laboratory, during which time I studied the interaction of protamine with rabbit muscle phosphorylase, I became so enamored with biochemistry that"

simple protein   

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