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Effects of increasing concentrations of SMX-TMP on the light emission (relative light units) of E. coli detected with the bioluminescence imaging system. Each concentration of SMX-TMP (0.3, 0.6, 0.9, and 1.2 mg/liter) was incubated with the bioluminescent E. coli for 30 min (▪) and 4 h (□) at 35°C in Luria broth. The sample labeled “Control” is the untreated strain.
