Opioid and Cannabinoid Receptors Share a Common Pool of GTP-Binding Proteins in Cotransfected Cells, But Not in Cells Which Endogenously Coexpress the Receptors

Abstract
1. Opioid (μ, δ, κ) and cannabinoid (CB1, CB2) receptors are coupled mainly toGi/GoGTP-binding proteins. The goal of the present study was to determine whether different subtypes of opioid and...