Lactose Operon

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ceojinkim
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Lactose Operon

Post by ceojinkim » Sun May 14, 2006 3:48 am

I have a biology exam coming tuesday on Gene Regulation.
Please help me.

What binds to and distorts the shape of the repressor?
Anyone have an idea?
Is it something to do with RNA Polymerase???
Confused.
Thank you so much.

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surya
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Post by surya » Sun May 14, 2006 11:03 am

Lactose acts as inducer.The inducer binds to repressor and modifies its structure in such a way that the repressor cannot bind to opertator.

When lactose is absent,the repressor molecule produced by lactose inducer binds with the operator region of operon and thereby switching off the operon.

pdavis68
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Post by pdavis68 » Mon May 22, 2006 3:54 am

A small correction, though I guess a bit late for the question: Technically, allolactose is the inducer. e. coli converts a small amount of lactose to allolactose and this then binds to the repressor.

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