Strain Relevant genotype Description Reference
M5402 Spy : lacZ Wild type of M5403 [23]
M5403 /p TolC tolC /pTrc99AtolC+ Complemented tolC-mutant [23]
N7829 (GC4468)   Wild type of M5652 [23]
M5403 tolC spy::lacZ Defective for tolC-mediated efflux [23]
M5403/pTrc99A pTrc99AAmpr Defective for tolC-mediated efflux [23]
M5403/pTolC-turn1 mutant   Defective for tolC-mediated efflux [29]
M5652 tolC Defective for tolC-mediated efflux this study
Table 2: Bacterial strains used in this study.