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. 1990 Jan;17(1):7-12.
doi: 10.1007/BF00313242.

Conditional hyporecombination mutants of three REC genes of Saccharomyces cerevisiae

M S Esposito  1 , J T Brown
Affiliations

Conditional hyporecombination mutants of three REC genes of Saccharomyces cerevisiae

M S Esposito et al. Curr Genet. 1990 Jan.

Abstract

We have isolated and characterized three conditional hyporecombination mutants, rec1-1, rec3-1 and rec4-1, that define three REC genes of Saccharomyces cerevisiae required for spontaneous general mitotic interchromosomal recombination. Each MATa/MAT alpha rec/rec diploid is deficient in mitotic single site gene conversion, intragenic recombination, intergenic recombination and sporulation at the restrictive temperature (36 degrees C). The rec1-1 mutation also confers conditional enhanced sensitivity to the killing effects of X-rays. The rec1-1 and rec3-1 mutations have been mapped to chromosome VII. The rec1-1, rec3-1 and rec4-1 mutations exhibit complementation at 36 degrees C for both mitotic recombination and sporulation.

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