Endogenous opioids and cyclic AMP.
D015105:3',5'-Cyclic-AMP Phosphodiesterases / Q000378:metabolism; D000262:Adenylyl Cyclases / Q000378:metabolism; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D002478:Cells, Cultured; D000242:Cyclic AMP / Q000378:metabolism*; D004723:Endorphins / Q000502:physiology*; D004745:Enkephalins / Q000494:pharmacology; D009020:Morphine / Q000494:pharmacology; D009294:Narcotics / Q000494:pharmacology; D011494:Protein Kinases / Q000378:metabolism
D004723:Endorphins; D004745:Enkephalins; D009294:Narcotics; D009020:Morphine; D000242:Cyclic AMP; D011494:Protein Kinases; D015105:3',5'-Cyclic-AMP Phosphodiesterases; D000262:Adenylyl Cyclases