Transcription of katN is RpoS and growth phase dependent Salmonella strains carrying the Tn5B21 inserts G57 and I28 were initially selected because they contain RpoSregulated lacZ gene fusions ( Ibanez-Ruiz et al. , 2000 ) .
Consistent with a role for RpoS in the regulation of katN was not produced in the Salmonella rpoS Fig. 2A .
Consistent with a role for RpoS in the regulation of katN was not produced in the Salmonella rpoS mutant SL1344K .