FIG. 6.

Strengths of long and short σ^E-dependent promoters under basal levels of σ^E expression. The graphs show promoter strengths of the top 10 most active long and short σ^E-dependent promoters in strains expressing basal levels of σ^E (basal; derivatives of CAG45113) compared with promoter strengths in strains without σ^E (delta sE; derivatives of CAG22216). Promoter strengths were measured during the exponential phase (A) or stationary phase (B) of growth at 32°C in LB. The bars represent the averages of three independent experiments, and error bars represent 1 standard deviation. Note the delta σ^E activities of the long yecI and plsB promoters in exponential phase are represented numerically.