Figure 3.
DNA contour length distributions of bare DNA (top panel) and RPo complexes (bottom panel) at the λ pR promoter. (A) With 200 μM ppGpp and 1 mM ATP, 0.1 mM UTP. (B) With 1 mM ATP, 0.1 mM UTP. (C) With 200 μM ppGpp added after RPo formation.
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