The recent finding of a role for the recA gene in DNA replication restart does not negate previous data showing the existence of recA-dependent recombinational DNA repair, which occurs when there are two DNA duplexes present, as in the case for recA-dependent excision repair, for postreplication repair (i.e., the repair of DNA daughter-strand gaps), and for the repair of DNA double-strand breaks. Recombinational DNA repair is critical for the survival of damaged cells.
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Kendric C. Smith (2004) studied this question.
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