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Which of the factor in prokaryotic NER acts as the helicase?

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Which of the factor in prokaryotic NER acts as the helicase?

(a) Urv A

(b) Ruv C

(c) TFIIH

(d) Uvr D

The question was posed to me in quiz.

The doubt is from Repair of DNA Damage: NER, Direct Reversal in chapter DNA Mutation, DNA Repair, Transposable Elements of Cytogenetics

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Correct choice is (d) Uvr D

For explanation I would say: Uvr D is the factor responsible unwinding the DNA in prokaryotes and excising the sequence with the lesion. On the other hand, TFIIH is also a helicase for eukaryotes.

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