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Figure 1 | Genome Biology

Figure 1

From: The cyclophilins

Figure 1

A schematic illustration of the trans and cis isomers of the peptide bond between proline (on the left of each structure shown) and another amino acid (P1, on the right). The interconversion between the two forms is catalyzed by cyclophilins and other peptidyl-prolyl isomerases (PPIases) [7]. The carbon atoms of the proline are indicated by Greek letters; P2 indicates a third amino acid on the other side of the proline. The peptide bond has some double-bond character and is planar.

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