Effect of yacon diet on gluconeogenesis gene (phosphoenolpyruvate carboxykinase 1 (Pepck) (a) and glucose-6-phophatase (G6pase) (b)) genes expression during euglycemic-hyperinsulinemic clamp studies in liver samples. Total RNAs extracted from liver tissues (control group (□; clamp: n=8) and yacon group (▪; clamp: n=8)) were used for gene expression analysis of Pepck (a) and G6pase (b). Levels of Cph were used for normalization of sample loading. Values are means±s.e.m. of data obtained from the analysis of the rats fed with control or yacon. Data are expressed relative to control values. *: P<0.01; vs control rats.