Opioid Receptor Family Products GPCR Family Subtypes and Products

Opioid receptors are a family of G protein-coupled receptors (GPCRs) comprised of five receptor subtypes: delta, kappa, mu, nociceptin receptor, and zeta. Opioid receptors are found all throughout the brain, spinal cord, and digestive tract. They play a major role in a variety of functions including analgesia, anti-depression, anxiety, euphoria, appetite, and sedation. There are currently a large host of clinical drugs that target the mu receptor for its analgesic effects, such as morphine and naloxone.