Schematic representation of the pET-PT7(RpoD), pET-PT7(FliA), pACYC-PT7(GFP), pACYC-PrrnB(GFP), and pACYC-PrrnB(Luc) plasmids. Ori, Escherichia coli replication origin; Kanr and Ampr, genes conferring resistance to kanamycin and ampicillin, respectively; RpoD, OY-M rpoD gene without its own promoter; FliA, OY-M fliA gene without its own promoter; LacI, lactose repressor; PT7/lacI, T7 promoter regulated by LacI; PrrnB, transcription promoter of the OY-M rrnB gene; GFP,gfp reporter gene; Luc, luciferase reporter gene; N, NdeI; S, SalI; B, BglII; H, HindIII.