TABLE 2 .

Strains used in the study

Strain	Relevant characteristic(s)	Reference or source
Gram negative
Escherichia coli
MG1655	E. coli K-12 derivative (poorly motile)	65
MG1655-motility+	Motile MG1655	Gift from D. Murat
MG1655 F′ tet	F+, biofilm-forming strain, Tetr	66
MG1655 ΔamtB	ΔamtB	17
MG1655 ΔspeABCDE	ΔspeABCDE	17
TG1 ∆KCP	Source of the chloramphenicol resistance cassette	Laboratory collection
TG1 ΔaspC	ΔaspC	17
TG1 Δred	ΔtorA ΔdmsA ΔtorYZ ΔynEFGH dmsD Kmr Cmr Specr	This study
TG1 ∆aspC ∆red	TG1 Δred ΔaspC Kmr Cmr Specr Tetr	This study
BW25113	E. coli K-12 derivative	60
BW25113 ΔbetT	ΔbetT Kmr	60
BW25113 ΔcaiT	ΔcaiT Kmr	60
BW25113 ΔproU	ΔproU Kmr	60
BW25113 ΔproP	ΔproP Kmr	60
BW25113 ΔyeaV	ΔyeaV Kmr	60
BW25113 ΔyehX	ΔyehX Kmr	60
BW25113 ΔyhjE	ΔyhjE Kmr	60
BW25113 ΔyiaM	ΔyiaM Kmr	60
BW25113 ΔshiA	ΔshiA Kmr	60
BW25113 ΔputP	ΔputP Kmr	60
BW25113 ΔafuC	ΔafuC Kmr	60
BW25113 ΔmetN	ΔmetN Kmr	60
BW25113 ΔglnQ	ΔglnQ Kmr	60
BW25113 ΔkgtP	ΔkgtP Kmr	60
BW25113 ΔpotA	ΔpotA Kmr	60
W25113 ΔpotG	ΔpotG Kmr	60
BW25113 ΔycjV	ΔycjV Kmr	60
BW25113 ΔydfJ	ΔydfJ Kmr	60
MG1655 tetR-ptetO lacZ	tetR-ptetO lacZ transcriptional fusion (Tets)	36
P. aeruginosa PAO1		Laboratory collection
Gram positive
S. aureus HG001		67
B. subtilis
168		68
3610		Laboratory collection