Return to Contents Chapter 27: Amino Acids, Peptides and Proteins Ch 27 contents

Disulfide Bonds

disulfide formation

Two cysteine units form a simple disulfide

A schematic diagram of two disulfides from the protein structure of bovine insulin.

The following 3D JSMOL image shows the A and B chains of human insulin and contains 3 disulfide linkages including those described above
(bovine and human insulin differ only by 3 amino acid residues in these two chains)
 




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organic chemistry © Dr. Ian Hunt, Department of Chemistry University of Calgary