Ultraviolet-Sensitive Mutator mutU4 of Escherichia coli Inviable with polA
AUTOR(ES)
Siegel, Eli C.
RESUMO
Attempts to transduce the ultraviolet-sensitive mutator lesion mutU4 into strains deficient in deoxyribonucleic acid polymerase I (polA) were unsuccessful. Mutator recombinants were found when the polA recipient had first been reverted to Pol+ by selection for resistance to methyl methanesulfonate. The inviability of the mutU4 polA double mutant was demonstrated by a reduction in the absolute number of transductants when the recipient was polA as compared with Pol+, and selection was made for markers very close to mutU4. Double mutants containing mutU4 and polA4, which determines a cold-sensitive polymerase, were unable to grow at 24 C, the nonpermissive temperature.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=251613Documentos Relacionados
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