Lactose Operon

Discussion of all aspects of cellular structure, physiology and communication.

Moderators: honeev, Leonid, amiradm, BioTeam

Post Reply
Posts: 3
Joined: Sun Apr 02, 2006 2:50 am

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???
Thank you so much.

User avatar
Posts: 127
Joined: Sun Mar 19, 2006 12:11 pm
Location: India

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.

Death Adder
Death Adder
Posts: 57
Joined: Mon Apr 03, 2006 8:37 pm

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.

Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests