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Relative mRNA expression of antioxidant genes in the intestine of grass carp fry. (A) Nuclear factor erythroid 2-related factor 2 (Nrf2); (B) Kelch-like ECH-associated protein 1 (Keap1); (C) Catalase (CAT); (D) Copper zinc superoxide dismutase (Cu/Zn-SOD); (E) Glutathione peroxidase 1α (GPx-1α); (F) Glutathione peroxidase 4 (GPx-4). Data are expressed as means with SEM. Values with different superscripts are significantly different (P < 0.05).
