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Figure 5.
Figure 5. Structure of the five-residue reverse turn and
C-terminal segment in M7-A (A) and M7-B (B). In M7-A the peptide
bond 9-10 adopts cis form and both NH10 and CO9 groups of the
peptide are out of the reverse turn to interact with the
C-terminal residues. In M7-B the group NH10 contacts neither
residue 8 nor C-terminal residues in flexible state and, thus,
the peptide bond 9-10 takes cis/trans co-existence. For clarity
the side-chains of residues 8-12 are only shown corresponding to
the cis form of the peptide 9-10, with deletion of His10 not
shown in the Figures.
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