Signaling diversity of mu- and delta- opioid receptor ligands: Re-evaluating the benefits of β-arrestin/G protein signaling bias - ScienceDirect
κ-opioid receptor - Wikipedia
Opioid Hedonic Hotspot in Nucleus Accumbens Shell: Mu, Delta, and Kappa Maps for Enhancement of Sweetness “Liking” and “Wanting” | Journal of Neuroscience
Delta-Opioid Receptor Analgesia Is Independent of Microglial Activation in a Rat Model of Neuropathic Pain | PLOS ONE
The Role of Opioids and Their Receptors in Urological Malignancy: A Review | Journal of Urology
Opioid receptor mRNA distribution in human brain. | Download Table