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Which of the following promotes branch migration at higher rates than does Rec-A?

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Which of the following promotes branch migration at higher rates than does Rec-A?

(a) Rec-B

(b) Rec-C

(c) Rec-D

(d) Ruv-A and Ruv-B

This question was posed to me by my school principal while I was bunking the class.

Question is from DNA Recombination in section DNA, RNA and Protein Metabolism of Biochemistry

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Correct answer is (d) Ruv-A and Ruv-B

To elaborate: Ruv-A and Ruv-B proteins form a complex that binds to Holliday intermediates, displays Rec-A protein and promotes branch migration at higher rates than does Rec-A.

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