Describe the structure of lac operon. How does lac
operon get activated and inactivated during the
expression of genes?
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The proteins are not produced by the bacterium when lactose is unavailable as a carbon source. ... However, the lacI gene (regulatory gene for lac operon) produces a protein that blocks RNAP from binding to the operator of the operon. This protein can only be removed when allolactose binds to it, and inactivates it.
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