How photosynthetic reaction centers control oxidation power in chlorophyll pairs P680, P700, and P870.

@article{Ishikita2006HowPR,
  title={How photosynthetic reaction centers control oxidation power in chlorophyll pairs P680, P700, and P870.},
  author={Hiroshi Ishikita and Wolfram Saenger and Jacek Biesiadka and Bernhard Loll and Ernst-Walter Knapp},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2006},
  volume={103 26},
  pages={
          9855-60
        }
}
At the heart of photosynthetic reaction centers (RCs) are pairs of chlorophyll a (Chla), P700 in photosystem I (PSI) and P680 in photosystem II (PSII) of cyanobacteria, algae, or plants, and a pair of bacteriochlorophyll a (BChla), P870 in purple bacterial RCs (PbRCs). These pairs differ greatly in their redox potentials for one-electron oxidation, E(m). For P680, E(m) is 1,100-1,200 mV, but for P700 and P870, E(m) is only 500 mV. Calculations with the linearized Poisson-Boltzmann equation… CONTINUE READING
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