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The activities of catalase (CAT) (A), glutathione peroxidase (GPx) (B), Mn-superoxide dismutase (SOD) (C), Cu,Zn-SOD (D), and thioredoxin reductase (TR) (E) in the trophocytes and fat cells of young and old queens. Bars represent mean±SEM (n=8 in (A), n=6 in (B), n=6 in (C), n=6 in (D), n=6 in (E)). Asterisks indicate statistical significance as determined by two-sample t-test (*) p<0.05; (**) p<0.01).
