Figure 3.
Dose–response curves for endogenous, plant-derived and synthetic agonists. (a) Oocytes were perfused with AM1902, AM782, AM2233, AM411, and WIN55,212-2 at the indicated concentrations. Despite widely varying EC50's, all compounds showed full agonism. (b) Oocytes were perfused with anandamide, AM356, 2-AG (ester), 2-AG ether, Δ9-THC, and WIN55,212-2 at the indicated concentrations. 2-AG and WIN55,212-2 were fully efficacious at 10 μM, whereas, 2-AG ether, Δ9-THC, anandamide, and AM356 elicited only 40–60% of the Maximal WIN Response at 10 μM (N=11–20 per concentration).