TABLE 1.

Strains and plasmids used in this study

Strain or plasmidRelevant genotypeSource or reference
Isogenic strains
    MG1655Wild-type E. coli K-12, rph-1
    STL8198ΔrelA::FRTThis study
    STL8246ΔdksA::FRT catThis study
    CF1693relA::kan spoT207::cat46
    STL11655arpoB337049
    STL13119spoT(E319Q)This study
Plasmids
    iraD::luxCDABE29
    P1-iraD600/375::luxCDABEThis study
    P2-iraD262/1::luxCDABEThis study
  • a Strain provided by D. Jin, denoted previously (49) as “MG1655 rpoB3370.”