Thiyl free radicals and the oxidation of ferrocytochrome c. Direct observation of coupled hydrogen-atom- and electron-transfer reactions. |
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Authors: | L G Forni and R L Willson |
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Abstract: | Absolute rate constants for the reaction of ferrocytochrome c with the thiyl radicals derived from cysteine, GSH, penicillamine and N-(2-mercaptopropionyl)glycine were measured by using the technique of pulse radiolysis. The reaction is believed to occur through a one-electron-transfer process, in agreement with the hypothesis that thiols may act as catalysts linking hydrogen-atom- and electron-transfer reactions. |
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