The powerful effects of opiate are mediated through the opioid receptors located on the plasma membrane of neurons and other peripheral cells. There are at least 3 types of opioid receptors, mu, kappa, and delta, each with a distinct pharmacologic profile. The mu opioid receptor is the primary site of action for the most commonly used opioids, including morphine, heroin, fentanyl, and methadone.
![Immunohistochemistry mu Opioid R/OPRM1 Antibody (1126B) [Unconjugated]](http://images.novusbio.com/fullsize2/mu_Opioid_R_MAB8629_Immunohistochemistry_16797.jpg)
![Western Blot mu Opioid R/OPRM1 Antibody (677014) [Unconjugated]](http://images.novusbio.com/fullsize2/mu_Opioid_R_MAB6866_Western_Blot_11056.jpg)
