Fig 5.

Schematic representation of the lacZ translational fusions and their corresponding β-galactosidase activities with elrR provided in trans. At the top, the elrA promoter region is schematized with the two transcription start sites t1 and t2 and the 50-bp inverted repeat indicated by the lollipop as defined previously (6). DNA fragments encompassing elrA promoter regions were fused to the lacZ coding sequence in two vectors. Transcription from tetM of vector pVE14189 was stopped by rho-independent transcription terminators, Term (black lollipop). tetM of vector pVE14195 was reversed and Term terminators were removed compared to pVE14189. β-Galactosidase activities of strains expressing elrR (ElrR⁺⁺) and plasmid control (Vector) are the averages of at least three independent experiments. nd, not done.