Electronic structure of Q-A in reaction centers from Rhodobacter sphaeroides. I. Electron paramagnetic resonance in single crystals.

@article{Isaacson1995ElectronicSO,
  title={Electronic structure of Q-A in reaction centers from Rhodobacter sphaeroides. I. Electron paramagnetic resonance in single crystals.},
  author={Roger A Isaacson and Friedhelm Lendzian and Edward C. Abresch and Wolfgang Lubitz and George Feher},
  journal={Biophysical journal},
  year={1995},
  volume={69 2},
  pages={311-22}
}
The magnitude and orientation of the electronic g-tensor of the primary electron acceptor quinone radical anion, Q-A, has been determined in single crystals of zinc-substituted reaction centers of Rhodobacter sphaeroides R-26 at 275 K and at 80 K. To obtain high spectral resolution, EPR experiments were performed at 35 GHz and the native ubiquinone-10 (UQ10) in the reaction center was replaced by fully deuterated UQ10. The principal values and the direction cosines of the g-tensor axes with… CONTINUE READING

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