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. 2001 Feb 1;29(3):759–766. doi: 10.1093/nar/29.3.759

Figure 4.

Figure 4

Capacity for regulation of simple circuits and with two cascades using a different hierarchy of upstream and downstream regulators. S, 2 mM salicylate; B, 2 mM benzoate; 3,5dClS, 2 mM 3,5-dichlorosalicylate. Basal values of β-galactosidase activity from each circuit established in E.coli were the following: nahR/Psal, 65 MU (black bars); xylS2/Pm, 192 MU (open bars); nahR/Psal→xylS2/Pm, 169 MU (gray bars); xylS2/Pm→nahR/Psal, 69 MU (hatched bars). Data are the mean values of three independent experiments. The corresponding standard deviations are indicated with error bars.