title: Neurotransmitter candidates in the visual system of Limulus polyphemus: synthesis and distribution of octopamine.
mesh_terms: D000109:Acetylcholine / Q000096:biosynthesis; D000818:Animals; D001921:Brain / Q000378:metabolism; D005123:Eye / Q000378:metabolism*; D006737:Horseshoe Crabs / Q000378:metabolism* / Q000502:physiology; D018377:Neurotransmitter Agents; D009655:Octopamine / Q000096:biosynthesis* / Q000502:physiology; D009900:Optic Nerve / Q000378:metabolism; D012701:Serotonin / Q000096:biosynthesis; D005680:gamma-Aminobutyric Acid / Q000096:biosynthesis
chemical_list: D018377:Neurotransmitter Agents; D009655:Octopamine; D012701:Serotonin; D005680:gamma-Aminobutyric Acid; D000109:Acetylcholine