A chain

A polypeptide component of insulin containing 21 amino acyl residues, beginning with a glycyl residue (NH2-terminus); insulin is formed by the linkage of an A chain to a B chain by two disulfide bonds; the amino-acid composition of the A chain is a function of species.

Synonym: glycyl chain.

In general, one of the polypeptides in a multiprotein complex.

(05 Mar 2000)


Terms mentioned in text: polypeptide, component, insulin, acyl, residues, glycyl, terminus, formed, linkage, a chain, b chain, disulfide bonds, acid, composition, chain, function, species, glycyl chain, general, polypeptides, complex
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