Fig. 1

Colony formation of C. glutamicum wild type in the presence of different ciprofloxacin concentrations. The cells were cultured in CGXII (4 % (w/v) glucose) to an OD₆₀₀ of 15 and ciprofloxacin was added. After five hours of ciprofloxacin exposure, cells were diluted in 0.9 % NaCl to an OD₆₀₀ of 1 and further diluted. Colony forming units (cfu) were determined. Experiments were performed in biological duplicates and colony number determined for two technical replicates