Although the birtoxin-like polypeptides, including<unk> , are 58 amino acids long and have only three disulfide bridges, they resemble long chain neurotoxins, which typically have a length of 60–70 amino acids and four disulfide bridges.<unk> , as most of the known scorpion toxins, has α-helixes that are lined up with basic amino acid residues. Furthermore,<unk>  has localized positively and negatively charged surfaces, a unique property of the birtoxin polypeptide family.
Bestoxin
Ikitoxin
Mucrocetin
Saxitoxin
Tacrine
Guanitoxin
Visine
Equilenin