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Definitions of C Peptide

  1. A 31- amino acid peptide which connects the A and B chains of proinsulin. The exact composition of the peptide is species dependent. In beta cells proinsulin is enzymatically converted to insulin with the liberation of the C- peptide. An immunoassay has been developed for assessing pancreatic beta cell secretory function in diabetic patients in whom circulating insulin antibodies and exogenous insulin interfere with insulin immunoassay.
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