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Related to protamine: protamine insulin
pro·ta·mine(prō′tə-mēn′, -mĭn) also pro·ta·min (-mĭn)
Any of a group of arginine-rich proteins that bind to and package DNA in the sperm nucleus. Protamines are used in long-acting formulations of insulin and to neutralize the anticoagulant effects of heparin.
(Biochemistry) any of a group of basic simple proteins that occur, in association with nucleic acids, in the sperm of some fish
[C19: from German: see proto-, amine]
prot•a•mine(ˈproʊ təˌmin, prɒˈtæm ɪn)
any of a group of arginine-rich, strongly basic proteins that are not coagulated by heat.