Figure 1 - full size

Figure 1. FIGURE 1. A, structural superimposition of the N-terminal -helix of wt Pa cyt c[551] (green) and F7A mutant (cyan). Interatomic distances between hydrogen bonded main chain atoms are shown. B, electron density map at 1.86 Å resolution of the F7A mutant showing details of the cavity generated by the mutation. The three water molecules that fill the cavity together with the H-bonds (dashed lines) established with the protein are shown.