title: Enkephalin and drug dependence.
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D006556:Heroin Dependence / Q000209:etiology; D006801:Humans; D007930:Leucine; D008024:Ligands; D008715:Methionine; D009433:Neural Inhibition; D010455:Peptides / Q000502:physiology*; D011957:Receptors, Opioid / Q000187:drug effects / Q000502:physiology*; D013375:Substance Withdrawal Syndrome / Q000209:etiology; D008083:beta-Lipotropin / Q000502:physiology
chemical_list: D008024:Ligands; D010455:Peptides; D011957:Receptors, Opioid; D008083:beta-Lipotropin; D008715:Methionine; D007930:Leucine