Abstract
Bacillus thuringiensis (Bt) is a gram-positive bacterium that has its lines studied mainly for pest insect control due to the insecticidal capacity of most of its proteins (Cry and Vip). However, recent studies indicate the presence of other proteins without insecticidal action. These proteins called Parasporins (PS) have cytotoxic activity and have six subfamilies, being PS1, PS2, PS3, P…