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Effect of dietary β-sitosterol inclusion at various levels on intestinal mucosal mRNA relative expression levels in broilers (A and B). Data are shown as means and standard errors (n = 6). Keap1, Kelch-like ECH-associated protein 1; Nrf2, nuclear factor (erythroid-derived-2)–like 2; TLR4, toll-like receptor 4; MyD88, myeloid differentiation factor 88. a, bDifferent letters indicate significant differences among the treatments (P < 0.05).
