Figure 1. Screen for GLUT inhibition.

Relative transport activity of GLUTs in proteoliposomes in the presence of inhibitors, using the entrance counter-flow transport assay. Each point is an average of at least three measurements and error bars represent standard deviation. All inhibitors were added at 20 mM. Rub, Ast and Ast6G are abbreviations for rubusoside, astragalin and astragalin-6-glucoside, respectively. (a) GLUT5-mediated fructose transport. (b) GLUT1-mediated glucose transport.