Figure 10. Structure-Based Sequence Alignment of cytochromes c₁, c, and c₂. The sequences are vertebrate cytochrome c₁ (1BCC, middle sequence), mitochondrial cytochrome c (eqine 1HRC, top sequence), and bacterial cytochrome c₂ (Rb. capsulatus 1C2R, bottom sequence). The symbols between the lines indicate closeness of superposition of Ca atoms of the aligned residues: ( | ) 1 Å or less, (~) between 1 and 2 Å. The sequence numbering of the beef cytochrome c is indicated above, and that of bovine cytochrome c₁ below, the alignment.