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Effects of Cd on (A) glutathione peroxidase (GPx), (B) glutathione S-transferase (GST), (C) glutathione reductase (GR), (D) superoxide dismutase (SOD), and (E) catalase (CAT) activities. Hepatocytes were treated with 2.5, 5, and 10 µM Cd. GPx, GST, GR, SOD, and CAT activities were measured after 12 and 24 h. Each experiment was repeated six times and data are expressed as the mean ± SD (*p < 0.05 and **p < 0.01).
