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Characterization of σ⁵⁴ promoter activity

We performed the function check of σ⁵⁴ promoter in the genome of E. coli.

By measuring the amount of mRNA of glnG, the promoter activities in the different glutamine concentration were measured (Fig.1). The activity in 0.0 % glutamine was defined as a standard and those in 0.2 and 2.0 % glutamine were Figure 1 shows that the activities in 0.2 and 2.0 % glutamine are repressed to less than one-fifth of that in 0.0 % glutamine.

Fig.1: The σ⁵⁴ promoter activity in the different glutamine concentration. The activity in 0.0 % glutamine was defined as a standard and the activities in 0.2 and 2.0 % were the relative values.

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