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Published January 1937 | Published
Journal Article Open

Sulfhydryl oxidation-reduction potentials derived from thermal data


The isolation of glutathione by Hopkins in 1921 and his experiments suggesting that this compound is probably an intermediary in biological oxidations and reductions awakened an active interest in the biological significance of sulfhydryl compounds in general (1, 2). Among the fundamental data pertaining to these compounds are their oxidation-reduction potentials. Soon after the discovery of glutathione a number of attempts were made to measure these potentials by electrometric and calorimetric methods. In all except the most recent investigations the potential observed in aqueous solutions with noble metal electrodes was independent of the concentration of the oxidized form (R—S—S—R) (3-5).

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© 1937 American Society of Biological Chemists. Received for publication, August 24, 1936.

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