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19-03-2020
Biology

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What is the effect of the cap protein on the transcription level of the lac operon?

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aleruchiboniface aleruchiboniface

19-03-2020

Answer:

The lac repressor senses lactose indirectly, through its isomer allolactose. Catabolite activator protein (CAP) acts as a glucose sensor. It activates transcription of the operon, but only when glucose levels are low. CAP senses glucose indirectly, through the "hunger signal" molecule cAMP.

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