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Showing 1 to 2 of 2 for “"Quinone Sites"”.
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Investigation of the quinone sites in reaction centers from Rhodobacter sphaeroides by pulsed EPR and spectral simulations
… pair of bacteriochlorophylls to two acceptor quinones, QA and QB. Both quinone sites are occupied by identical ubiquinone molecules, yet take on very different roles. QA can only accept and donate a single electron, and serves as a one-electron gate to QB. QB can accept two electrons and, by …
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The Binding Pockets of QA and QB in the Photosynthetic Reaction Center of Rba. sphaeroides Probed by Pulsed EPR
… of cofactors, the final two are identical ubiquinones (QA and QB). Both ubiquinones can be stabilized in their reduced (semiquinone) state allowing for their binding pockets to be studied with EPR (electron paramagnetic resonance) spectroscopy. Using the pulsed EPR technique, ESEEM (electron …