Fig. 8.

Effect of methionine supplementation on the expression of the toll-like receptor 2 gene, TLR2, toll-like receptor 5 gene, TLR5, interleukin 1 beta gene, IL1B, interleukin 2 gene, IL2, interferon gamma gene, IFNG, and lipopolysaccharide-induced tumor necrosis factor-alpha factor, LITAF gene in the jejunum of broiler chickens. Results are expressed as arbitrary units, AU, and are presented as mean and standard error. ^a,b Different letters represent significant differences between treatments by the Tukey test, P < 0.05. NS = non-supplemented diet; dl-Met = diet supplemented with free methionine; dl-MMet = diet supplemented with methionine dipeptide