A point for discussion of the bc1 complex, a proton-pumping oxidoreductase of repiratory and photosynthetic electron transport chains.
Sunday, June 8, 2008
Recent Article
The mechanism of mitochondrial superoxide production by the cytochrome bc1 complex. Stefan Drose and Ulrich Brandt J. Biol. Chem., June 3, 2008
1 comment:
Ed Berry
said...
Important finding was that rate of superoxide production decreases when the Q pool is fully reduced, is maximal when around half-reduced. This suggests if a semiquinone is involved its formation requires oxidized quinone. This could be by electron transfer from reduced cytochrome b back to oxidized quinone at the Qo site, consistent with a concerted reaction involving no semiquinone for the forward reaction at Qo.
1 comment:
Important finding was that rate of superoxide production decreases when the Q pool is fully reduced, is maximal when around half-reduced. This suggests if a semiquinone is involved its formation requires oxidized quinone. This could be by electron transfer from reduced cytochrome b back to oxidized quinone at the Qo site, consistent with a concerted reaction involving no semiquinone for the forward reaction at Qo.
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