Answer :
There is a binding site for a protein called the protein degradation activator protein proximal of the transcription (CAP).
- The binding of something like the CAP protein bending the DNA as well as facilitates RNA polymerase attachment, which dramatically improves the transcription of both the lac operon.
- With the help of coupled CAP, RNA polymerase may connect to the lac operon promoter. Whenever lactose has been available, the operator would activate the lac repressor
- This makes it possible for RNA polymerase to continue transcription of something like the operon on the DNA. Catabolite activator protein (CAP) should indeed connect to cAMP for RNA polymerase to start transcription of either the lac operon.
The DNA located 61.5 kb forward of the transcription start point is where the protein degradation gene activator-cyclic AMP combination (CAP) interacts and positively controls the lactose (lac) operon promoter.
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