The 2-Minute Rule for buy actavis promethazine codeine cough syrup online
G-protein coupled opioid receptor that functions as a receptor for endogenous alpha-neoendorphins and dynorphins, but has reduced affinity for beta-endorphins. Also functions being a receptor for several artificial opioids and for your psychoactive diterpene salvinorin A. Ligand binding causes a conformation adjust that triggers signaling by means