Effect of Gs-Rb1 on AMPK activity in cardiomyocytes. 1, 2, 3, 4, 5, 6, and 7 represented 0, 10, 50, 100, 200, 400, and 500 μmol/L Gs-Rb1 incubation based on 200 μmol/L CoCl2 for 12 h. Number 8 represented 500 μmol/L ara-A based on 200 μmol/L Gs-Rb1 and 200 μmol/L CoCl2 together. n=3 for all groups.