Fig. 2From: Inhibition of ecto-ATPase activity by curcumin in hepatocellular carcinoma HepG2 cellsEffects of ecto-ATPase inhibitors on ecto-nucleotidase activity in the presence of ATP. Ecto-nucleotidase activity was significantly inhibited by 1 mM suramin (n = 4), 500 μM DIDS (n = 8) and 500 μM ZnCl2 (n = 6). **Significantly different (p < 0.01) versus the activity in the absence of inhibitors (control)Back to article page