FIGURE 4.

Accumulation of RB in P. aeruginosa cells. Cells were incubated with RB (100 μM) or RB+PEX (100 μM each compound) for the time indicated at 37°C. First, the bright field picture was taken, and then immediately fluorescence was observed with the λ_ex = 510–550 nm, and λ_em > 570 nm.