The insecticidal CryIB crystal protein of Bacillus thuringiensis ssp. thuringiensis has dual specificity to coleopteran and lepidopteran larvae.

@article{Bradley1995TheIC,
  title={The insecticidal CryIB crystal protein of Bacillus thuringiensis ssp. thuringiensis has dual specificity to coleopteran and lepidopteran larvae.},
  author={D. DeNardo Bradley and M A Harkey and Min Kyung Kim and K. Duane Biever and Leah S. Bauer},
  journal={Journal of invertebrate pathology},
  year={1995},
  volume={65 2},
  pages={
          162-73
        }
}
The crystals found in sporulation extracts of Bacillus thuringiensis (Berliner) contain proteins that are highly toxic to insects. Different crystal proteins exhibit distinct specificities for restricted groups of insects. An uncharacterized strain of B. thuringiensis (BtS2), derived from China, was found to carry several crystal protein genes and to be toxic to a wide variety of insects, including some coleopterans. Surprisingly, the coleopteran toxicity was traced to a CryIB-class protein… CONTINUE READING
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