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, as short neurotoxins. In addition, the position of cysteine residues is not conserved. Belongs to the snake three-finger toxin family. Long-chain subfamily. Type II alpha-neurotoxin sub-subfamily.