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Recycling of Glutathione by Glutathione Reductase. Glutathione (GSH) is maintained in a reduced form by glutathione reductase (GR) in a NADPH-dependent manner. Enzymes are labelled in green. Glutathione peroxidases (GPx), glutaredoxin (Grx). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
