Figure 1 - full size

 

Figure 1.
Figure 1. The chemical structures of the peptide aldehydes, antipain and chymostatin from Streptomyces. Chymostatin is isolated as a mixture of three forms, A, B, and C. These have R groups of leucine (A), valine (B), or isoleucine (C) side-chains.

The above figure is reprinted by permission from Elsevier: J Mol Biol (1996, 255, 714-725) copyright 1996.