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| C-Peptide Connecting Peptide | C Peptide | Peptide, Connecting 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. |