Figure 1.
Left: Ribbon diagram of hh cyt c (pdb id: 1hrc). The 40’s Ω loop is orange, its β-sheet ‘neck’ is red, the 60’s & 70’s helices are green and the Met80 loop is gray. H-bonds are shown in dashed blue lines for P44/H26, and for W59 and Y48 with a heme propionate. Right: The full H-bond pattern of the heme propionates with residues in the 40’s and Met80 loops, and the Tyr67/Met80 H-bond.