role of lac repressor in regulation of lac operon
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The lac repressor is a protein that represses (inhibits) transcription of the lac operon. ... When lactose is not available, the lac repressor binds tightly to the operator, preventing transcription by RNA polymerase. However, when lactose is present, the lac repressor loses its ability to bind DNA
A repressor protein turns the operon off. It binds to the operating region, blocking RNA polymerase from transcribing the lac genes. It attaches to the repressor, which causes the repressor to fall off the operator. Transcription can take place.
A repressor protein turns the operon off. It binds to the operating region, blocking RNA polymerase from transcribing the lac genes. It attaches to the repressor, which causes the repressor to fall off the operator. Transcription can take place.
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