Is there a sleep transmitter?
D000818:Animals; D001921:Brain / Q000502:physiology; D001923:Brain Chemistry; D002415:Cats; D002555:Cerebrospinal Fluid / Q000032:analysis; D000882:Haplorhini; D007106:Immune Sera / Q000032:analysis; D009419:Nerve Tissue Proteins / Q000502:physiology; D018377:Neurotransmitter Agents / Q000502:physiology*; D009638:Norepinephrine / Q000502:physiology; D010880:Piperidines / Q000502:physiology; D011817:Rabbits; D012701:Serotonin / Q000502:physiology; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology; D012895:Sleep, REM / Q000502:physiology; D005680:gamma-Aminobutyric Acid / Q000502:physiology
D007106:Immune Sera; D009419:Nerve Tissue Proteins; D018377:Neurotransmitter Agents; D010880:Piperidines; D012701:Serotonin; D005680:gamma-Aminobutyric Acid; D009638:Norepinephrine