Figure 2From: Digitoxin and its analogs as novel cancer therapeutics Effects of digitoxin on Na+ /K+ -ATPase at micromolar and nanomolar concentrations. (A) Old theory model summarizes the effect of digitoxin at 0.5-5 μM concentrations. (B) New theory model summarizes digitoxin's effect at 0.01-0.1 μM concentrations.Back to article page