Figure 10.
Overlay of CXXCH pentapeptide backbone for ten cytochromes c with diverse residues in the variable “XX” positions shown in (A) ball-and-stick and (B) ribbon format. Each protein is represented with a different color in (B). Proteins with crystal structures with 1.5-Å or better resolution were selected. The PDB accession codes and the identity of the variable “XX” resides in the structures are: 1B7V (IS), 1GU6 (AD), 1IQC (NS), 1YNR (MA), 1CTJ (AA), 2CTH (GD), 351C (VA), 1HRC (AQ), 1C2R (KT), 2YCC (LQ).