Electron Paramagnetic Resonance-detectable Electron Acceptors in Beef Heart Mitochondria
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چکیده
منابع مشابه
Electron Paramagnetic Resonance-detectable Electron Acceptors in Beef Heart Mitochondria
The EPR-detectable (24.2 K) electron acceptors of the DPNH-ubiquinone reductase segment of the electron transfer system of beef heart mitochondria were studied in preparations of varying complexity. Four distinct iron-sulfur centers associated with this segment of the electron transfer system were identified. They occur in approximately equal concentrations, and this concentration approximates ...
متن کاملElectron paramagnetic resonance-detectable electron acceptors in beef heart mitochondria. Ubihydroquinone-cytochrome c reductase segment of the electron transfer system and complex mitochondrial fragments.
The electron acceptors in ubihydroquinone-cytochrome c reductase (Complex III) derived from beef heart mitochondria were investigated by low temperature electron paramagnetic resonance spectroscopy at 120 K and optical reflectance spectroscopy at 100 K. Three resonances were resolved in the region where the low field lines of low spin ferric heme compounds are usually found. These lines were as...
متن کاملElectron paramagnetic resonance-detectable electron acceptors in beef heart mitochondria. Reduced diphosphopyridine nucleotide ubiquinone reductase segment of the electron transfer system.
The EPR-detectable (24.2 K) electron acceptors of the DPNH-ubiquinone reductase segment of the electron transfer system of beef heart mitochondria were studied in preparations of varying complexity. Four distinct iron-sulfur centers associated with this segment of the electron transfer system were identified. They occur in approximately equal concentrations, and this concentration approximates ...
متن کاملElectron paramagnetic resonance of beef-heart ferricytochrome c.
We have observed an anisotropic EPR spectrum in a frozen solution of the low-spin (~=i) ~e~op~tein ferricytochrome c. These results are interpreted in terms of the theory for ~e low-sp~ femc lon m an octahedral crystal field which is subject to an (axial) distortion along. the a:os perpendicu~r ~ the heme plane and a (rhombic) distortion in the plane of the heme, and a spm--{)rblt cons~t which ...
متن کاملElectron Paramagnetic Resonance
where E0 is the energy level without any external magnetic field B = B0êz. Again, g denotes the g factor[5]. For induced transitions, the selection rule is ∆ms = ±1. For unpaired electrons, however, this selection rule is observed for all transitions, as S = 12 and, hence, ms ∈ {− 12 , 2}. The previous formulas are based on the assumption that the response of the material on the external magnet...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1974
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)42873-1