ebpR and ebpA expression profiles in OG1RF. A. Expression levels of ebpA and ebpR using gene promoter::lacZ fusions. OG1RF containing either P
::lacZ (black triangle) or P
::lacZ (black square) were grown in TSBG. For β-gal assays, samples were collected every hour from 3 to 8 hr, then at 10 and 24 hr after starting the culture (x axis). The left axis represents the β-gal units (OD420 nm/protein concentration in mg/ml). The right axis indicates the OD600 nm readings. All sets of cultures presented were analyzed concurrently. This figure is a representative of at least three independent experiments. B. qRT-PCR with RNA purified from OG1RF cultures grown aerobically in TSBG. The left axis represents the level of transcript normalized to gyrB transcript level. The right axis indicates the OD600 nm readings. The dashed line shows the mean (with standard deviation) of 5 independent cultures of OG1RF grown in TSBG. The transcript levels of ebpR (black triangle) and ebpA (black square) shown represent two different data sets, each tested in duplicate that were normalized using gyrB transcript levels.