	"Centruroides suffusus suffusus" is a Mexican scorpion from the genus "Centruroides" belonging to the family "Buthidae". "C. suffusus suffusus" has at least seven different β-toxins, of which CssII is considered the major toxin in the venom affecting mammals. The single gene for CssII has been identified, and cloned using "E. coli", resulting in recombinant CssII.