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Relative activity of antioxidation enzymes catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPX), and glutathione reductase (GR) and levels of hydrogen peroxide (H2O2) in the mammary gland with intramammary infusion of either lipopolysaccharide (LPS) or PBS (Control) for 12 h (A) and in the plasma of mice before (0 h) and after intramammary infusion of LPS for 12 h (B). Error bars represent standard error (n = 9). *P < 0.05, **P < 0.01.
