... Acceleration of the cis–trans isomerization of the peptide results in the collapse of theseresonances into a single set of peaks. (D) Binding, but not isomerization, of the N-terminal peptide of PPWD1. ... interactions between the backbonenitrogen of Glu485 with the oxygen of Gly551, the side-chain of Glu485 is nestled in a deep pocket of the enzyme (Fig. 3B). An oxygen of the c-carboxyl groupforms ... the Cyps may play. Insummary, the interactions seen between the QAEGPKR peptide and PPWD1 active site in the cur-rent structure might be a product of an inability of the Fig. 1. Structure of...