TABLE 1.

Bacterial strains and plasmids used in this study

Strain or plasmidRelevant genotype and propertySource or reference
E. coli strains
    W3110Wild typeE. coli Stock Center
    LW12W3110 ΔluxS::KanThis study
    ZK126W3110 ΔlacU169 tna-29
    ZK1000ZK126 ΔrpoS::Kan2
    LW2ZK126 Δcrp::Kan50
    LW7ZK126 ΔluxS::Kan50
    LW8ZK126 ΔlsrR::Kan50
    LW9ZK126 Δ(lsrACDBFG)::Kan50
    LW11ZK126 ΔlsrK::Kan50
Plasmids
    pFZY1galK′-lacZYA transcriptional fusion vector, Apr21
    pJLlsrRpFZY1 derivative, containing lsrR promoter region, AprThis study
    pJLlsrKpFZY1 derivative, containing lsrK promoter region, AprThis study