Reaction centers transfer energetics

Wachtveitl, J., Huber, H., Feick, R., Rautter, J., Muh, F., and Lubitz, W. (1998) Electron transfer in bacterial reaction centers with an energetically raised primary acceptor ultrafast spectroscopy and endor/triple... 

The redox chlorins at the core of the various reaction centers form an obvious chain with separations of less than 6 A that ensure rates of 10 ps or less. The effect of this chain is to apparently make the photoinduced oxidant and reductant capable of residing briefly on any of the chlorins, subject principally to the free energy of that state and the energetic penalty of any uphill reverse electron transfer. When the free energy... 

Schmidt, S., Arlt, T., Hamm, P., Huber, H., Nagele, T, Wachtveitl, J., Meyer, M., Scheer, H., and Zinth, W., 1994, Energetics of the primary electron-transfer reaction revealed by ultrafast spectroscopy on modified bacterial reaction centers. Chem. Phys. Lett., 223 116fil20. 

Warshel, A., Chu, Z. T., and Parson, W. W., 1994, On the energetics of the primary electron-transfer process in bacterial reaction centers. J. Photochem. Photobiol., 82 123nl28. 

Fig. 10. (A) and (B) Two models for the electron-transfer sequence in bacterial reaction centers. (C) Population densities of various intermediary states as a function of time calculated according to the model shown in (B). See text for discussion. Figure source (A) and (8) Holzapfel, Finkele, Kaiser, Oesterheldt, Scheer, Stilz and Zinth (1989) Observation of a bacteriochlorophyll anion radical during the primary charge separation in reaction center. Chem Phys Lett 160 5 (C) S Schmidt, T Arit, P Hamm, H Huber, T NSggle, J WachtveitI, M Meyer, H Scheer and W Zinth (1994) Energetics of the primary electron transfer reaction reveaied by ultrafast spectroscopy on modified bacterial reaction centers. Chem Phys Lett 223 118.

Problems Evaluating Energetics of Electron Transfer from Qa to Qb The Light-Exposed and Dark-Adapted Bacterial Reaction Center... 

The energetic process of photosynthesis is represented by Fig. 13-1 where the electron from water is driven to higher energy in two steps (at photosystems II and I, abbreviated to PSII and I) at the reaction center of chlorophyll, and finally reduces CO2 to produce carbohydrate. Metal complexes and metal clusters play a decisive role in photoinduced energy transfer, photoinduced electron transfer and catalysis. 

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