Acetylcholine.
D000109:Acetylcholine / Q000032:analysis / Q000502:physiology*; D000110:Acetylcholinesterase / Q000032:analysis*; D000818:Animals; D001001:Anura; D002490:Central Nervous System / Q000201:enzymology*; D055598:Chemical Phenomena; D002621:Chemistry; D003964:Diaphragm / Q000201:enzymology; D004950:Esterases / Q000032:analysis; D005399:Fishes; D006651:Histocytochemistry; D007498:Iris / Q000201:enzymology; D008854:Microscopy, Electron; D009132:Muscles / Q000201:enzymology; D009469:Neuromuscular Junction / Q000201:enzymology; D051381:Rats; D013237:Stereoisomerism; D013570:Synaptic Membranes / Q000201:enzymology; D009435:Synaptic Transmission; D013572:Synaptic Vesicles / Q000201:enzymology
D004950:Esterases; D000110:Acetylcholinesterase; D000109:Acetylcholine