Effect of yacon diet on Trb3 (a) and Pgc-1α (b) genes expression during euglycemic-hyperinsulinemic clamp studies in liver samples. Total RNAs extracted from liver tissues and skeletal muscle of control group (□; clamp: n=8) and yacon group (▪; clamp: n=8) were used for gene expression analysis of Trb3 (a) and Pgc-1α (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.