title: Insensitivity of acetylcholinesterases to organophosphorus compounds as related to size of esteratic site.
mesh_terms: D000818:Animals; D001001:Anura; D001042:Aphids / Q000201:enzymology; D001665:Binding Sites; D001921:Brain / Q000201:enzymology; D002794:Choline; D002800:Cholinesterase Inhibitors; D003058:Cockroaches / Q000201:enzymology; D004175:Diptera / Q000201:enzymology; D004952:Esters; D008925:Mites / Q000201:enzymology; D009943:Organophosphorus Compounds / Q000494:pharmacology*
chemical_list: D002800:Cholinesterase Inhibitors; D004952:Esters; D009943:Organophosphorus Compounds; D002794:Choline