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. 1979 Mar;76(3):1045-8.
doi: 10.1073/pnas.76.3.1045.

Circular dichroic evidence for a conformational change in a cytochrome b--c1 complex by uncoupling agents

J Reed, T A Reed, B Hess

Circular dichroic evidence for a conformational change in a cytochrome b--c1 complex by uncoupling agents

J Reed et al. Proc Natl Acad Sci U S A. 1979 Mar.

Abstract

Circular dichroic spectra of the cytochrome b--c1 complex exhibit bilobe formation typical of exciton splitting in the presence of uncoupler. Bilobe formation occurs if both cytochrome c1 and cytochrome b are fully reduced. The fully oxidized and ascorbate-reduced complexes are not altered dichroically by uncouplers. The exciton splitting induced by uncoupler is consistent with heme--heme interaction: specifically, interaction between the two cytochromes b in the complex.

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