We describe a novel system for the analysis of sequence-specific meiotic recombination in Saccharomyces cerevisiae. A comparison of three adjacent restriction fragments from the human beta-globin locus revealed that one of them, previously hypothesized to contain a relative hot spot for genetic recombination, engages in reciprocal exchange during yeast meiosis significantly more frequently than either of the other two fragments. Removal of the longest of four potential Z-DNA-forming regions from this fragment does not affect the high frequency of genetic recombination.
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Treco et al. (1985) studied this question.
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