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High-field EPR studies of the structure and conformational changes of site-directed spin labeled bacteriorhodopsin.
Cw and pulsed high-field EPR (95 GHz, 3.4 T) are performed on site-directed spin labeled bacteriorhodopsin (BR) mutants. The enhanced Zeeman splitting leads to spectra with resolved g-tensorExpand
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Molecular orbital study of polarity and hydrogen bonding effects on the g and hyperfine tensors of site directed NO spin labelled bacteriorhodopsin
Semiempirical molecular orbital methods (PM3, INDO, ZINDO/S) have been used to calculate the effects of local electric fields and of hydrogen bonding on the g and hyperfine tensors of a nitroxideExpand
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A novel high-field/high-frequency EPR and ENDOR spectrometer operating at 3 mm wavelength
A high-field/high-frequency EPR and ENDOR system operating at 3 mm wavelength is described. The probe-head designs of two different resonator types, i.e. an open Fabry-Perot resonator and aExpand
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Molecular orbital study of the primary electron donor P700 of photosystem I based on a recent X-ray single crystal structure analysis
Abstract The X-ray structure analysis of photosystem (PS) I single crystals showed that the primary electron donor P700 is a heterodimer formed by one chlorophyll (Chl) a and one Chl a ′ [Nature 411Expand
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High-field EPR spectroscopy applied to biological systems: characterization of molecular switches for electron and ion transfer.
The last decade witnessed a tremendous growth in combined efforts of biologists, chemists and physicists to understand the dominant factors determining the specificity and directionality ofExpand
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High-field EPR and ESEEM investigation of the nitrogen quadrupole interaction of nitroxide spin labels in disordered solids: toward differentiation between polarity and proticity matrix effects on
The combination of high-field electron paramagnetic resonance (EPR) with site-directed spin labeling (SDSL) techniques employing nitroxide radicals has turned out to be particularly powerful inExpand
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General TRIPLE resonance on free radicals in solution. Determination of relative signs of isotropic hyperfine coupling constants
For the first time a general type of electron–nuclear–nuclear TRIPLE resonance has been performed on radicals in liquid solution. In this method two inequivalent nuclei are irradiated simultaneouslyExpand
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A Configuration Interaction (CI) Description of Vectorial Electron Transfer in Bacterial Reaction Centres
The purpose of this communication is to report a CI method for calculating the electronic matrix elements between the various prosthetic groups of a bacterial reaction centre (RC), relevant forExpand
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Intermolecular electronic interactions in the primary charge separation in bacterial photosynthesis
In this paper the intermolecular overlap approximation is used to calculate the relative magnitudes of the electronic transfer integrals between the excited singlet state ({sup 1}P*) of theExpand
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ENDOR study of the (7′,7′-dicyano)- and (7′-phenyl)-7′-apo-β-carotene radical cations formed by UV photolysis of carotenoids adsorbed on silica gel
The radical cations of two synthetic carotenoids, 7′-7′-dicyano-7′-apo-β-carotene (I) and 7′-phenyl-7′-apo-β-carotene (II), have been prepared by UV irradiation of samples adsorbed on silica gel. TheExpand
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