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. 2015 Feb 25;11(2):e1005007. doi: 10.1371/journal.pgen.1005007

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© 2015 Chou et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 4 — Transcriptional activity (defined as GFP/OD) of the pntAB, acs, and epd promoters are scaled by 10⁻⁴ and the epd-CBS hybrid promoter by 10⁻⁵ to fit into these plots. Transcriptional activity at the exponential phase (defined as OD = 0.1–0.3) is highlighted by a grey window in each panel. Results from one of the three independent experiments are shown as the representative.