Interaction of ?-opioid receptors with multiple G-proteins: A non-relationship between agonist potency to inhibit adenylyl cyclase and activation of G-proteins
Prather, P.L., Loh, H.H., Law, P.Y. Interaction of ?-opioid receptors with multiple G-proteins: A non-relationship between agonist potency to inhibit adenylyl cyclase and activation of G-proteins. Mol. Pharmacol. 1994; 45:997-1003, PMID 8190115.