Transient W-band EPR study of sequential electron transfer in photosynthetic bacterial reaction centers

Article Abstract:

Activation energy for the electron transfer process between P+HQ(subA-) and P+H-Q(subA) is the dominant factor that is altered in the slow Zsubn-RCsubs. To arrive at this conclusion, electron-spin polarized electron paramagnetic resonance spectroscopy data was obtained for deuterated iron-removed/zinc-substituted phtosynthetic bacterial reaction centers. Experiments were done based on the principle photosynthetic solar energy conversion.

Usage, Chemistry, Physical and theoretical, Physical chemistry, Electron paramagnetic resonance spectroscopy

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Electron transfer between quinones in photosynthetic reaction centers

Article Abstract:

The mechanism of electron transfer (ET) between quinones in bacterial reaction center (RC) is discussed on the basis of theoretical computations of the minimum energy nuclear configurations and ET coupling elements and quantum dynamic simulations of elementary reaction steps. This study suggests that the iron-histidine bridge can play an important role in the ET mechanism.

Science & research, Quinone, Quinones

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Magnetic-field-induced orientation of photosynthetic reaction centers as revealed by time-resolved W-band EPR of spin-correlated radical pairs

Article Abstract:

Magnetic-field-induced orientation of photosynthetic reaction center proteins has been shown to arise in the field of a W-band EPR spectrometer. This orientation takes place because of the anisotropy of the diamagnetic susceptibility of the reaction center protein.

Analysis, Photosynthesis research

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