Aerobic Reduction of Cytochrome b 566 in Pigeon-Heart Mitochondria
- 1 January 1972
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 69 (1) , 50-54
- https://doi.org/10.1073/pnas.69.1.50
Abstract
In anaerobic, uncoupled pigeon-heart mitochondria treated with oxidizable substrate, the cytochrome b 566 remains largely oxidized. In the presence of antimycin A, addition of oxygen induces a reduction of this cytochrome. The rate of cytochrome b 566 reduction is comparable to and dependent on the rate of cytochrome c 1 oxidation. Kinetic data suggest that either ubiquinone or another donor of similar potential provides electrons for the reduction of cytochrome b 566 . It is postulated that the aerobic reduction of cytochrome b 566 is directly related to the energy conservation at site II.Keywords
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