title: Modulation of morphine analgesia by opioid peptides. Implications for antinociceptive processes.
authors.affiliation: Department of Biological Research, McNeil Pharmaceutical, Spring House, Pa.
authors.forename: J L
authors.initials: JL
authors.lastname: Vaught
authors.forename: R W
authors.initials: RW
authors.lastname: Barrett
mesh_terms: D000698:Analgesia; D000818:Animals; D004723:Endorphins / Q000502:physiology*; D051379:Mice; D009020:Morphine; D011957:Receptors, Opioid / Q000502:physiology*; D017465:Receptors, Opioid, delta; D017450:Receptors, Opioid, mu
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid; D017465:Receptors, Opioid, delta; D017450:Receptors, Opioid, mu; D009020:Morphine