TABLE 4 

Strains of E. coli and S. enterica serovar Typhimurium used

StrainDescriptionSource or reference
E. coli
    JB578HfrH Su+ thi gal r m+ RifrLaboratory collection
    TN521DJ901(Δlac-4169) Φ(soxR+ soxS′::lacZ)26
    TN531DJ901(Δlac-4169) Φ(ΔsoxR soxS′::lacZ)26
S. Typhimurium
    SL3770LT2 pyr+ rfa+55