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Tissue expression (fold change) of leptin in the liver, intestines, hypothalamus, and pancreas (A, B, C, and D, respectively) of chicken broilers fed diets containing 75, 100, and 125% lysine of National Research Council (NRC) requirement. The chicken glyceraldehyde-3-phosphate dehydrogenase (GAPDH) “house-keeping” gene was used as an endogenous control. a,b,cWithin individual charts, bars representing mean gene expression with no common superscripts differ significantly (P < 0.05).
