it is in the C form that insulin is stored in our body.if insulin was not stored in our body it would digest all the carbohydrates fats proteins etc in our body
It is well known that C-peptide fulfills an important function in the synthesis of insulin. After cleavage of proinsulin in the pancreatic ?-cells, the 31-amino acid C-peptide is secreted into the portal circulation in equimolar concentrations with insulin.