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Biology 23 Online
OpenStudy (anonymous):

Which region of the operon does the repressor bind to?

OpenStudy (bohotness):

In the absence of lactose, the repressor protein encoded by the I gene binds to the lac operator and prevents transcription. Binding of allolactose to the repressor causes it to leave the operator. This enables RNA polymerase to transcribe the three genes of the operon.

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