After transfected by AK1 siRNA, L6 cells were incubated with 5 mM glucose with or without different concentration of potassium gluconate for 1 hour, and then glucose uptake was measured as described under “Materials and methods”. C: control; Ko: AK1 siRNA; 40K: 40 mM potassium gluconate; 80K: 80 mM potassium gluconate; 120K: 120 mM potassium gluconate; * p < 0.05 versus control; ** p < 0.01 versus 80K and 120K, respectively.
