Second messengers: new vistas.
D000818:Animals; D000242:Cyclic AMP / Q000494:pharmacology*; D006152:Cyclic GMP / Q000494:pharmacology*; D004790:Enzyme Induction / Q000187:drug effects; D009474:Neurons / Q000187:drug effects / Q000502:physiology*; D018377:Neurotransmitter Agents; D011957:Receptors, Opioid / Q000502:physiology; D013569:Synapses / Q000187:drug effects / Q000502:physiology; D014446:Tyrosine 3-Monooxygenase / Q000096:biosynthesis
D018377:Neurotransmitter Agents; D011957:Receptors, Opioid; D000242:Cyclic AMP; D014446:Tyrosine 3-Monooxygenase; D006152:Cyclic GMP