C-peptide (c-peptide) est connectens peptide composito ex XXXI amino acida cum molecular pondus de MMMXXI Daltons. Pancreaticum β-cellulis pancreatis synthesize proinsulin, quod est valde longum interdum catenam. Proinsulin destructum in tres segments in actione enzymes et frontem et retro segments reconnected ad insulin, quod est compositum ex et a B cathagam, cum media segmentum est independens et quod C, peptide. Insulin and C-peptide are secreted in equimolar concentrations, and after entering the blood, most of insulin is inactivated by the liver, while C-peptide is rarely taken up by the liver, plus C-peptide degradation is slower than insulin, so the concentration of C-peptide in the blood is higher than that of insulin, usually more than 5 times, so C-peptide more accurately reflects functio pancreaticae islet β-cellulis. Et mensurae de campester of C-peptide potest ad genus diabete Mellitus et intelligere munus pancreatic β-cellulis diabete Mellitus aegris. C-Peptide gradu mensurae potest ad referendum diabete et intelligere munus pancreatic β-cellulis in aegris cum diabete. Currently, c-peptide mensurae modi late in medical clinics includit radioimmunoassay, enzyme immunoassay, electroymlumluminence, chemilinumesesignes.