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Bacillus thuringiensis (Bt) is the major source for transfer of genes to impart insect resistance in transgenic plants. Cry2A proteins of Bt are promising candidates for management of resistance development in insects due to their difference from the currently used Cry1A proteins, in structure and insecticidal mechanism. Two insecticidal crystal protein genes of Bt, viz. cry2Aa and cry2Ab were cloned...
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