The Effect of an Electric Field on the Charge Recombination Rate of D+Q− A → DQA in Reaction Centers from Rhodobacter sphaeroides R-26

The name of the game in photosynthesis is effective charge separation across the plasma membrane of photosynthetic organisms. The main focus of this conference has been to understand this process quantitatively. In a sense one can view the different contributions from spectroscopy, x-ray structure determinations, dynamics, the effect of mutagenesis etc. as providing the experimental and theoretical frameworks upon which electron transfer (ET) theories are built. To critically test the validity of ET theories, it is important to devise experiments that focus on particular predictions of the theory. This has been done in the present work whose aim was to test the free energy dependence of electron transfer.

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