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A chain

 

Definition:

  1. the shorter polypeptide component of insulin containing 21 amino acyl residues, beginning with a glycyl residue (NH2-terminus); insulin consists of an A chain linked to a B chain by two disulfide bonds; the amino-acid composition of the A chain is a function of species;
  2. in general, one of the polypeptides in a multiprotein complex.
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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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