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. 2004 Sep 10;87(6):4298–4315. doi: 10.1529/biophysj.104.042945

FIGURE 9.

FIGURE 9

Oxidation-reduction (midpoint) potentials (in mV and at pH 7) of the constituents of the electron transport chain of the W. succinogenes QFR. The distances are given in Å and refer to inter-cofactor distances. Electron transfer rates in white are reoxidation rates of the fully reduced enzyme by fumarate; those in black are reduction rates of the fully oxidized enzyme, as compiled in Lancaster (2004). The assignment of the hemes (bDistal = bLow and bProximal = bHigh) is indicated as obtained by simulated heme redox titrations in the study presented here. The experimental heme midpoint potentials are taken from Lancaster et al. (2002); all others have been compiled in Lancaster (2004).