Why did Bacterial toxins not kill the bacteria but only the insects?
Bacillus thuringiensis is not killed by bacterial toxins. Because the poisonous protein exists as an inactive protoxin that, if consumed by an insect, is transformed into an active form of toxin due to the alkaline pH of the stomach, which dissolves the crystal. The activated toxin binds to the surface of midgut epithelial cells & creates pores that cause cell swelling and lysis.
