Presynaptic receptors.
D000818:Animals; D005246:Feedback; D006801:Humans; D009420:Nervous System / Q000254:growth & development / Q000648:ultrastructure; D009474:Neurons / Q000502:physiology; D011955:Receptors, Drug / Q000502:physiology*; D017981:Receptors, Neurotransmitter / Q000502:physiology*; D009626:Terminology as Topic
D011955:Receptors, Drug; D017981:Receptors, Neurotransmitter