mutM, a second mutator locus in Escherichia coli that generates G.C----T.A transversions.

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RESUMO

We used strains carrying specific lacZ alleles to identify a new mutator locus in Escherichia coli which generates only G.C----T.A transversions among base substitutions. The locus, mutM, mapped near the cysE locus, which is at 81 min on the genetic map.

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