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Expression of recA-gene dependent SOS functions in Salmonella typhimurium

  • Genetics and Molecular Biology
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Abstract

Thymine starvation of RecA+ Thy- strains of Salmonella typhimurium does not induce the inhibition of cellular respiration, one of the recA-gene dependent SOS functions. Nevertheless, thymine deprivation is able to produce a normal induction of prophage and thymineless death in these same strains. However, when these mutants are treated, in the presence of thymine, with UV-irradiation or bleomycin, they show a normal inhibition of cellular respiration and other SOS functions. Thus, one injurious treatment (thymine deprivation) may trigger prophage induction but not cessation of respiration, whereas another agent (UV-irradiation) may induce both. Together, these results suggest a possible discrimination in the pathways and conditions of expression of various SOS functions.

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Authors and Affiliations

  1. Department of Microbiology, Autonomous University of Barcelona, Bellaterra (Barcelona), Spain

    R. Guerrero & J. Barbé

  2. Institute for Fundamental Biology, Autonomous University of Barcelona, Bellaterra (Barcelona), Spain

    R. Guerrero & J. Barbé

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  1. R. Guerrero
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  2. J. Barbé
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Guerrero, R., Barbé, J. Expression of recA-gene dependent SOS functions in Salmonella typhimurium . Antonie van Leeuwenhoek 48, 159–167 (1982). https://doi.org/10.1007/BF00405200

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