Formation of microsomal cytochrome P-450 complexes studied by the NMR relaxation of water☆
| Autor: | Anders Ehrenberg, L.E.Göran Eriksson, Hans Grasdalen, Dan Bäckström |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
Magnetic Resonance Spectroscopy
Cytochrome biology Spin states Chemistry Relaxation (NMR) Biophysics Analytical chemistry Biochemistry Rats law.invention Nuclear relaxation Cytochrome P-450 Enzyme System law Phenobarbital Microsomes Liver biology.protein Microsome Animals Thermodynamics Physical chemistry Molecule Electron paramagnetic resonance Spin (physics) Molecular Biology |
| Zdroj: | Biochimica et Biophysica Acta (BBA) - General Subjects. 541:521-527 |
| ISSN: | 0304-4165 |
| DOI: | 10.1016/0304-4165(78)90161-7 |
| Popis: | Cytochrome P-450 in microsomes from liver of phenobarbital treated and control rats has been studied by light absorption and by magnetic resonance methods (EPR and NMR). The nuclear relaxation rate of water protons was measured for microsomal suspensions in the presence of various reactants of Type I and II. The change of relaxation rates correlates well with the spin state conversion of the heme iron. No competition between eventual inner-sphere water molecules and the reactants seems to occur. The temperature dependence of the low spin to high spin equilibrium was studied by light absorption and was accounted for in the temperature variation of the molar relaxation rates of the two spin states. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|