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Effects of lead (Pb), thymoquinone (TQ), and their coadministration on the kidney activities of superoxide dismutase (SOD, a), glutathione peroxidase (GPX, b), catalase (CAT, c), and glutathione reductase (GR, d) in rats after five weeks. Values are expressed as mean±SEM of eight animals. Student's t-test: *p<0.05 versus control; # p<0.05 versus TQ-treated rats; † p<0.05 versus Pb-treated rats.
