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. 2012 Mar 13;7(3):e32199. doi: 10.1371/journal.pone.0032199

Figure 2. Expression from the NTHi vapBC-1 promoter.

Figure 2

β-galactosidase activity indicating lacZ expression under vapBC-1 promoter control in wild type R2866 (diamonds), and R2866 mutants, Δfis (squares), ΔvapBC-1 (crosses), and Δfis ΔvapBC-1 (triangles), was measured every 30 minutes for 2 hours after nutrient upshift. The zero time point indicates expression in the stationary phase culture prior to dilution into fresh media. Each data point is the average of three independent assays performed in triplicate. Error bars are standard deviations.