B chain


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B chain

1. the longer polypeptide component of insulin containing 30 amino acyl residues, beginning with a phenylalanyl residue (NH2-terminus); insulin consists of a B chain linked to an A chain by two disulfide bonds; the amino acid composition of the B chain is a function of species;
2. the light chain of an immunoglobulin.

B chain

(chān)
A polypeptide component of insulin containing 30 amino acyl residues; insulin is formed by the linkage of a B chain to an A chain.