Thermodynamic parameters for PpcA mutants.

For comparison the values previously obtained for PpcA [17] were also included. For each cytochrome, the fully reduced and protonated protein was taken as reference. Diagonal values (in bold) correspond to oxidation energies of the hemes and deprotonating energy of the redox-Bohr centre. Off-diagonal values are the redox (heme-heme) and redox-Bohr (heme-proton) interactions energies. All energies are reported in meV, with standard errors given in parenthesis.