Figure 3From: Membrane transport of camptothecin: facilitation by human P-glycoprotein (ABCB1) and multidrug resistance protein 2 (ABCC2)Inhibition of 20-(S)-camptothecin (10 μM) efflux transport across Caco-2 cells. Each point represents the mean (± standard deviation) for at least three observations. * Efflux permeability (with inhibitor) is significantly different from the control (without inhibitor), P < 0.05. P eff, effective permeability.Back to article page