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. 2016 Aug 30;7:1344. doi: 10.3389/fmicb.2016.01344

Figure 4.

Figure 4

CO2 affected the expression of different gene promoters. Bacteria carrying reporter systems with different promoters were streaked onto BHI-agar plates and incubated at 37°C with or without 5% CO2. The signals were monitored by an IVIS 100 in vivo imaging system (Xenogen, Hopkinton, MA). (A) The plate incubated without 5%CO2. (B) The plate incubated with 5% CO2.(C) Color bar denoting the intensity of luminescence signals. (D) Distribution of streaks of bacteria harboring different promoters on the agar plate. (E) Different induction effect of β-lactam antibiotics on various virulence factors' promoters.