The expression levels of hepatic glycolysis and gluconeogenesis genes in gibel carp fed with HCD and NCD during 8 weeks. (a) Expression level of hepatic glucokinase (gck, gene), (b) expression level of hepatic 6-phosphofructokinase (6pfk, gene), (c) expression level of hepatic pyruvate kinase L/R (pklr, gene), (d) expression level of hepatic glucose transporter 2 (glut2, gene), (e) expression level of hepatic g6pase (g6pase, gene), and (f) expression level of hepatic phosphoenolpyruvate carboxykinase (pepck, gene). Values are expressed as means ± SEMs, n = 6. ∗, ∗∗, ∗∗∗Different from NCD: ∗P < 0.05, ∗∗P < 0.01, and ∗∗∗P < 0.005, NS means no significant difference (two-tailed independent t test).