Table 1

Bacterial strains used

StrainRelevant genotypeSource
3568Wild typeCGSC no. 7636
3569ΔsoxS::kanCGSC no. 10891
3570ΔsoxS::kanThis work, by P1-mediated transduction from 3569 into 3568
3571ΔsoxSThis work, by antibiotic marker excision (30) from 3570
3572ΔmarA::kanCGSC no. 11269
3573ΔsoxS ΔmarA::kanThis work, by P1-mediated transduction from 3572 into 3571
3574ΔsoxS ΔmarAThis work, by antibiotic marker excision (30) from 3573
3705ΔacrB::kanCGSC no. 8609
3706ΔacrBThis work, by antibiotic marker excision (30) from 3705