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Fig. 6 | Journal of Animal Science and Biotechnology

Fig. 6

From: Natural astaxanthin enhanced antioxidant capacity and improved semen quality through the MAPK/Nrf2 pathway in aging layer breeder roosters

Fig. 6

Effects of dietary natural astaxanthin (ASTA) supplementation on the mRNA expression of antioxidant enzymes, including Cu-Zn superoxide dismutase (SOD1) (a), Mn superoxide dismutase (SOD2) (b), glutathione peroxidase 1 (GPX1) (c), peroxidase 4 (GPX4) (d), and catalase (CAT) (e), relative to that of β-actin (ACTB). The values are expressed as the mean ± standard deviation of six birds per treatment group. a–d Means within a row with no common superscripts differ significantly (P < 0.05)

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