RecA + -dependent repair of gamma-ray damage to Escherichia coli does not require recombination between existing homologous chromosomes.
Chemostat-grown Escherichia coli showed recA(+)-dependent resistance to gamma radiation even though between 50 and 75% of the population possessed only a single unreplicated genome, suggesting that recombination between homologous chromosomes before replication is not necessary for manifestation of recA(+)-dependent resistance to gamma radiation.
D000332:Aerobiosis; D001431:Bacteriological Techniques; D002470:Cell Survival; D002876:Chromosomes, Bacterial; D003036:Cobalt Isotopes; D004260:DNA Repair; D004261:DNA Replication; D004269:DNA, Bacterial / Q000096:biosynthesis*; D004926:Escherichia coli / Q000254:growth & development / Q000378:metabolism* / Q000528:radiation effects*; D011830:Radiation Effects; D011831:Radiation Genetics; D011995:Recombination, Genetic
D003036:Cobalt Isotopes; D004269:DNA, Bacterial