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Selenium (Se) is an essential antioxidative micronutrient but can exert cancer-selective cytotoxicity if the nutritional levels are too high. Selenodiglutathione (GSSeSG) is a primary Se metabolite conjugated with two glutathione (GSH) moieties. GSSeSG has been suggested to be an important molecule for cytotoxicity. Here, we propose the underlying mechanisms for the potent cytotoxicity of GSSeSG:...
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