Receptor mechanisms.
D000109:Acetylcholine / Q000378:metabolism; D000110:Acetylcholinesterase / Q000378:metabolism; D055598:Chemical Phenomena; D002621:Chemistry; D008967:Molecular Biology; D011955:Receptors, Drug / Q000187:drug effects; D013237:Stereoisomerism
D011955:Receptors, Drug; D000110:Acetylcholinesterase; D000109:Acetylcholine