Binds with high affinity to muscular nicotinic acetylcholine receptors (nAChRs), whereas it binds with a low affinity to neuronal alpha-7/CHRNA7 nAChRs. Expressed by the venom gland. Has the length of long neurotoxins, but only 4 disulfide bonds instead of the 5 usually present in long neurotoxins. This may explain why this toxin has the low affinity to alpha-7 nAChRs of short neurotoxins, which have only 4 disulfide bonds. Belongs to the snake three-finger toxin family. Long-chain subfamily. Type II alpha-neurotoxin sub-subfamily.