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Electron spin resonance study of rapidly frozen solution of iron-glutathione |
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| Affiliation: | Chalmers University of Technology and University of Gothenburg, Department of Biochemistry and Biophysics, S-41296 Gothenburg, Sweden;Department of Chemistry, University of Birzeit, Birzeit, PO Box 14, West Bank, via Israel;Department of Chemistry, University of Essex, Wivenhoe Park, Colchester C04 3SQ, Essex, U.K. |
| Abstract: | Rapidly mixed anaerobic solutions (at pH 2.7) of FeCl3 and glutathione were quickly frozen at various times after mixing. EPR spectra of these frozen solutions showed the progressive reduction of the iron(III) with time and the transient presence of a g = 2 radical signal. This signal is discussed in terms of an intermediate in the reduction pathway containing a high spin iron(II) centre weakly coupled to a sulphur radicalSimilar experiments were carried out at pH 9 in the presence of oxygen. |
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