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Ogt, Ada and UvrA knockouts of E. coli used in this study. Also shown are the primer sequences and their locations as used for their confirmation after P1 transduction into the relevant tester strains. See Materials and methods for details. (A) Disruption of the ogt gene by replacement of the chloramphenicol resistance gene (cat), (B) disruption of ada gene introduced by tetracycline resistant gene (tetR and tetA) and (C) disruption of the uvrA gene as in (B).
