receptors on the membranes of mid-gut (epithelial) cells of the targeted pests, resulting in their rupture. Other organisms (including humans, other animals and non-targeted insects) that lack the appropriate receptors in their gut cannot be affected by the cry protein, and therefore are not affected by Bt.

Taxonomy and discovery

In 1902, B. thuringiensis was first discovered in silkworms by Japanese sericultural engineer . He named it B. sotto, using the Japanese

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