Bioinorganic Chemistry and Applications / 2012 / Article / Tab 1

Research Article

Fine Tuning of Redox Networks on Multiheme Cytochromes from Geobacter sulfurreducens Drives Physiological Electron/Proton Energy Transduction

Table 1

Thermodynamic parameters of the fully reduced and protonated forms of PpcA and PpcD obtained at 288 K and 250 mM ionic strength [20]. Redox potentials are relative to standard hydrogen electrode (SHE). Standard errors are given in parenthesis. The , , and values were determined from the values obtained for and redox-Bohr interactions.

PpcAPpcD

Heme redox
potentials (mV)

Heme-heme redox
interactions (mV)

Redox-Bohr
interactions (mV)

Stage 0 8.6 (0.1)8.7 (0.1)
Stage 1 8.0 (0.1)8.1 (0.1)
Stage 2 7.2 (0.1)7.4 (0.1)
Stage 3 6.5 (0.1)6.9 (0.1)