Mode of action of endogenous opiate peptides.

Adenylyl Cyclase Inhibitors Adenylyl Cyclases/metabolism Cell Line Enzyme Activation/drug effects Glioma/metabolism Hybrid Cells Kinetics Ligands Melanocyte-Stimulating Hormones/metabolism Morphine/metabolism Naloxone/pharmacology Nerve Tissue Proteins/metabolism Neuroblastoma/metabolism Oligopeptides/metabolism Prostaglandins E/pharmacology Receptors, Opioid/metabolism beta-Lipotropin/metabolism

Adenylyl Cyclase Inhibitors Ligands Nerve Tissue Proteins Oligopeptides Prostaglandins E Receptors, Opioid Naloxone Morphine Melanocyte-Stimulating Hormones beta-Lipotropin Adenylyl Cyclases