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Interaction of Bacillus thuringiensis delta -endotoxins with midgut brush border membrane vesicles of Helicoverpa armigera



Interaction of Bacillus thuringiensis delta -endotoxins with midgut brush border membrane vesicles of Helicoverpa armigera



Journal of Asia Pacific Entomology 2(2): 153-162



The pesticidal activity of different Bacillus thuringiensis (Bt) delta -endotoxins, Cry1Aa, Cry1Ab, Cry1Ac and Cry2A, was studied against Helicoverpa armigera infesting cotton crops worldwide. The Cry1Ac toxin was the most potent. All selected Bt toxins were stable to in vitro processing by midgut juice of H. armigera. Saturation and competition binding experiments were performed with iodine-125 labelled proteins and brush border membrane vesicles prepared from the midgut of H. armigera.

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Accession: 003480974

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