C-Peptide | | Other Peptide

C-Peptide

The connecting peptide, or C-peptide, is a short 31-amino-acid polypeptide that connects insulin's A-chain to its B-chain in the proinsulin molecule. In diabetes and other diseases a measurement of C-peptide blood serum levels can be used to distinguish between certain diseases with similar clinical features.

In the insulin synthesis pathway, first preproinsulin is translocated into the endoplasmic reticulum of beta cells of the pancreas with an A-chain, a C-peptide, a B-chain, and a signal sequence. The signal sequence is cleaved from the N-terminus of the peptide by a signal peptidase, leaving proinsulin. After proinsulin is packaged into vesicles in the Golgi apparatus (beta-granules), the C-peptide is removed, leaving the A-chain and B-chain bound together by disulfide bonds, that constitute the insulin molecule.

Catalog No.	Peptide Name	Sequence	Purity
P80030Hu1	[Tyr0]-C-Peptide, Human	YEAEDLQVGQVELGGGPGAGSLQPLALEGSLQ	> 98%
P80030Ce1	C-Peptide, Canine	EVEDLQVRDVELAGAPGEGGLQPLALEGALQ	> 98%
P80030Ce2	Tyr-C-Peptide, Canine	YEVEDLQVRDVELAGAPGEGGLQPLALEGALQ	> 98%
P80030Hu2	C-Peptide (57-87), Human	EAEDLQVGQVELGGGPGAGSLQPLALEGSLQ	> 98%
P80030Hu3	Proinsulin C-Peptide (55-89), Human	RREAEDLQVGQVELGGGPGAGSLQPLALEGSLQKR	> 98%

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