Bacteriocins are peptides or proteins with antimicrobial activities, and produced by some bacteria through the ribosome way. Because of their harmless and low drug resistance, they are welcomed in food and health safety. In this study, a putative bacteriocin gene AOI-3 was predicted from a whole-genome sequencedBacillus thuringiensis(Bt) BRC-ZYR2 and amplified by PCR with total DNA. Then the 231 bp PCR product was purified and ligated to p ET32 a expression vector by seamless cloning technology, and transfo...