Cobratoxin
α-Cobratoxin is a substance of the venom of certain Naja cobras. It is a nicotinic acetylcholine receptor (nAChR) antagonist which causes paralysis by preventing the binding of acetylcholine to the nAChR. == Sources == α-Cobratoxin is a neurotoxin from the venom of certain Naja genus, including the Thailand cobra, the Indochinese spitting cobra (Naja siamensis) and the Chinese cobra (Naja atra).