Fig. 3
From: Understanding gold toxicity in aerobically-grown Escherichia coli
Reactive Oxygen Species in HAuCl4-exposed E. coli. Total ROS and superoxide levels were assessed using H2DCFDA (a, b) and DHE (c, d) in gold-treated E. coli. The assays were conducted under aerobic (a, c) and anaerobic (b, d) conditions. The percentage in relation to untreated controls (100%) of the fluorescence intensity normalized by protein production was plotted. Data represent the average of 3 independent assays ± SD. Statistical significance was according to section Data analysis