C-peptide of human insulin is:

C-peptide of human insulin is a component used in the production of human insulin by recombinant DNA technology. The C-peptide is a short protein chain which is used to connect the A and B – peptide chains which are present in E.coli. After connecting the A and B peptide chains with disulphide bonds the C-peptide is removed during maturation of pro-insulin to insulin.