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What are Cry proteins? Name an organism ...

What are Cry proteins? Name an organism that produces it. How Has man exploited this protein to his benefit?

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Cry proteins are crystalline prteins produced by Bacillus thuringiensis. They are also known as Bt toxins. The toxin is coded by a gene named cry. There are a number of them, for exampl, the proteins encoded by the genes cryIAc and cryIIAb control the cotton to develop transgenic Bt-cotton plants.
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