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. 2012 Nov 20;3(6):e00253-12. doi: 10.1128/mBio.00253-12

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Copyright © 2012 Reynoso et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-ShareAlike 3.0 Unported license, which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original author and source are credited.

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FIG 1 — Riboswitch-mediated control of β-galactosidase in F. novicida. Strains encoding riboswitch E (E-Rs-βgal) or F (F-Rs-βgal) upstream of lacZ were grown in the presence (●) or absence (○) of 1 mM theophylline to an OD₆₀₀ between 0.7 and 0.8. β-galactosidase activity was measured in Miller units (left axis), and the activation ratio (green bar, right axis) was calculated by dividing the number of Miller units in the presence of theophylline by the number of Miller units in the absence of theophylline. The standard deviations of triplicate samples lie within the symbols. The data are representative of three independent experiments performed in triplicate.