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C-peptide is a connecting peptide between the alpha and beta chains of proinsulin and consists of 31 amino acids with a molecular weight of 3021.In islet beta cells, the single-chain polypeptide proinsulin membrane-dependent protease cleaves into equimola

The determination of islet (Ins) antibody can guide the dosage of insulin and the choice of insulin dosage form in type I diabetic patients. In addition, it can explain the reason of the low insulin release curve, that is, the decline of islet function or