Fig. 4
OD600 (a) and ROS production (b) in the presence of different concentration of NAC. 0.01 mM, 0.1 mM, or 1 mM NAC were respectively supplemented into the culture medium. After cultured for 15, 30, 45 min, and 24 h, aliquots were taken for the measurement of absorbance at 600 nm (a), and remaining samples were used for ROS detection (b). The fluorescence value in NAC-treated cells was compared to that in the control cells at each time point. Data are the means for three independent experiments and are presented as the means ± SD. *, P < 0.05, and **, P < 0.01