Table 2. Strains and plasmids used in this study.

Strain or plasmid	Description	Source or reference
E. coli K-12 laboratory strains:
MG1655	F- lambda- ilvG- rfb-50 rph-1	[50]
BSN26H	MC4100 trp::Tn10 hha::Tn5	[47]
BSN26Y	MC4100 trp::Tn10 ΔydgT	[25]
MG1655HY	F- lambda- ilvG- rfb-50 rph-1 hha ydgT	This work
MG1655HYΔrecA	F- lambda- ilvG- rfb-50 rph-1 hha ydgT recA	This work
MG1655HYΔrpoS	F- lambda- ilvG- rfb-50 rph-1 hha ydgT rpoS	This work
RH90	MC4100, rpoS359::Tn10, TcR	[48]
Plasmids:
pHly152	hlyR hlyCABD	[51]
pANN202-321R	hlyR hlyCABD cloned in pACYC184, cmr	[27]
pANN202-321R'	pANN202-321R Δhly	This work