Generally, peptide neurotoxins can be divided into two major families, the ‘long chain neurotoxins’ (LCN) with 60- to 70-residue range and known to contain eight cysteine residues; and the ‘short chain neurotoxins’ (SCN) with 30 to 40 peptides with six or eight cysteine residues.<unk> , together with other<unk> -like peptides including bestoxin, is 58 amino-acid residues long, close to the ‘long chain’ family but with six cysteine residues.<unk>  is reticulated by three disulfide bridges, instead of four, compared to other LCNs . Therefore, it is considered to be the evolutionary link between ‘long chain’- and ‘short chain’- families.
Birtoxin
Kurtoxin
Neurotoxin
Β-Bungarotoxin
Alpha-neurotoxin
Maitotoxin
Dinotoxin
Kaliotoxin