Neurotransmitters and modulators in the animal kingdom.
D000109:Acetylcholine / Q000502:physiology; D000613:Aminobutyrates / Q000502:physiology; D000818:Animals; D007448:Invertebrates / Q000502:physiology; D009411:Nerve Endings / Q000502:physiology*; D013569:Synapses / Q000502:physiology*; D014714:Vertebrates / Q000502:physiology
D000613:Aminobutyrates; D000109:Acetylcholine