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Chi sites are examples of special sites enhancing homologous recombination in their region of the chromosome. Chi, 5′ G‐C‐T‐G‐G‐T‐G‐G3′, is a recognition site for the RecBC enzyme, which nicks DNA near Chi as it unwinds DNA. A molecular model of genetic recombination incorporating these features is reviewed.
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Smith et al. (1985) studied this question.
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