What is bt toxin?

Bt toxin:

1. Bt toxin is produced by a bacterium called Bacillus thuringiensis (Bt for short).
2. Bt-toxin gene has been cloned from the bacteria and been expressed in plants to provide resistance to insects without the need for insecticides; in effect creating a bio-pesticide.
   Examples are Bt cotton, Bt corn, rice, tomato, potato, soybean, etc.
3. The toxin is coded by a gene cryIAc named cry.