Figure 2From: A systematic investigation of Escherichia coli central carbon metabolism in response to superoxide stressComparison of NADPH, NADH concentrations in E. coli JM101 incubated with and without paraquat. The X axis shows distinct coenzymes; the Y axis shows the optical density measurements. White bar: control; Black bar: paraquat-treated. The values and error ranges are the means and standard deviations of three independent measurements.Back to article page