Fig 3.
Schematic representation of lacZ translational fusions and their relative β-galactosidase activities. At top is shown the genomic organization of the elrR-elrA region with the PelrA promoter, and the potential rho-independent transcription terminator is indicated by a lollipop. DNA fragments encompassing the elrA upstream region were fused to the lacZ coding sequence. Transcription from tetM of the vector pVE14174 was arrested by rho-independent transcription terminators, Term (black lollipop). Ratios of β-galactosidase activities were normalized to the activity measured for PelrA::lacZ (1.29 ± 0.24 Miller units). Data provided are the averages of five independent experiments.