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Figure 4.
Solution structure of the PFUC domain. A, backbone
superposition of 15 lowest-energy structures in cis (left panel)
and trans (right panel) isomers. B, ribbon representation of the
structures for cis (left panel) and trans (right panel) isomers.
N and C indicate the N and C termini of PFUC, respectively. C,
comparison of the cis and trans isomers in the loop between β3
and β4 where Pro^77 resides. The Gly^76–Pro^77 prolyl bonds
in both cis- and trans-isomers are fit together and the side
chain positions of Gly^76 and Pro^77 are shown in red (cis) and
blue (trans).
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