Figure 2
The chemical structure of the inhibitor (FRY) co-crystallized with endothiapepsin. The sequence of the oligopeptide is Ser-Leu-Phe-His-PheTyr-Thr-Pro. There is a reduced peptide bond (indicated by an asterisk) between Phe and Tyr, i.e. the carbonyl group is replaced by a methylene –CH2– moiety. |