A REVIEW OF BUY ACTAVIS PROMETHAZINE COUGH SYRUP ONLINE

G-protein coupled opioid receptor that functions to be a receptor for endogenous alpha-neoendorphins and dynorphins, but has low affinity for beta-endorphins. Also functions for a receptor for several synthetic opioids and with the psychoactive diterpene salvinorin A. Ligand binding leads to a conformation transform that triggers signaling through