Figure 7. The position comparison of some key residues (including W59, Y67, H71 or P71, K73, F82) relative to heme ring upon overlaying heme ring.

(A) between the oxidized native cyt c (grey, pdb code 1YIC) and its P71H variant (green); (B) between the oxidized cyt c P71H variant (green) and cyt c alkaline form (red, pdb code 1LMS); (C) between the reduced native cyt c (gold, pdb code 1YFC) and its P71H mutant (magenta); (D) between the oxidized (green) and reduced P71H variant (magenta).