Abstract

The reactions of N . 3, CO - 3 and .ROH radicals with glutathione have been studied in basic aqueous solution. Whereas only the sulphur centered GS . (GSSG - ̇ ) radical is produced by the one-electron oxidants N . 3 and CO - 3, a strongly reducing radical is formed in pH-dependent yield by .ROH and .OH. The data are explained by pH-dependent conformational changes of glutathione on deprotonation of the amino and thiol groups.

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