Fig. 2From: Rate variation during molecular evolution: creationism and the cytochrome c molecular clockA simplified folding diagram for cytochrome c. Illustration by Irving Geis in Dickerson (1972, p. 59). Highly variable residue 89 is in a peripheral location at the top of the diagram, far from the central heme. Relatively invariant residues, such as glycine 84, are labelled with their abbreviated names preceding their residue numberBack to article page