TJ. Glutathione peroxidase is an important enzyme in cellular antioxidant defense systems, detoxifying peroxides and hydroperoxides. As a component of the glutathione cycle, it protects the liver from reactive oxygen metabolites. Selenocysteine Glutathione Metabolism an overview ScienceDirect Topics GHK Cu Peptide Foundry Premium Research Peptides Figure 1 from Glutathione redox cycle protects cultured endothelial cells against lysis by extracellularly generated hydrogen peroxide. Semantic Scholar Determination of Reduced and Total Glutathione Content in Extremophilic Microalga Galdieria phlegrea