Table 2 List of plasmids used in this study

pCP20

Amp^R, Cm^R, FLP⁺, 8 cI857⁺, 8 p_R Rep^ts

For removal of an frt-flanked kan marker from E. coli K12 strains by FLP-mediated site-specific recombination

[43]

pUC118

Amp^R, f1 ori, P_lacUV5, lacZα

Creative Biogene, Shirley, NY, USA

pCA24N-tolC

Cm^R; lacI^q, pCA24N P_T5-lac::tolC Δgfp

[44]

pCA24N-acrA

Cm^R; lacI^q, pCA24N P_T5-lac::acrA Δgfp

[44]

pCA24N-hmp

Cm^R; lacI^q, pCA24N P_T5-lac::hmp Δgfp

[44]