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. 2015 Feb 12;15(2):4229–4241. doi: 10.3390/s150204229

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Figure 3. — Intracellular concentration of activated regulator at the center of a bacterial colony as a function of the colony size. The signal molecule binding to the regulator is assumed second order and fully cooperative. Thin lines indicate the r_a level without feedback. Dashed lines are the numerical solution with open boundary (Σ = ²ρ_v), and dotted lines are with absorbing boundary ( $\sum = \frac{1}{3} R^{2} ρ_{v}$ ). Note that the ignition of the collective state always takes place at $r_{a} \sim \frac{b_{s}}{k_{s}} K_{s}$ , shown on the ordinate. Adapted from [11]—published by The Royal Society of Chemistry.

Inline graphic — Intracellular concentration of activated regulator at the center of a bacterial colony as a function of the colony size. The signal molecule binding to the regulator is assumed second order and fully cooperative. Thin lines indicate the r_a level without feedback. Dashed lines are the numerical solution with open boundary (Σ = ²ρ_v), and dotted lines are with absorbing boundary ( $\sum = \frac{1}{3} R^{2} ρ_{v}$ ). Note that the ignition of the collective state always takes place at $r_{a} \sim \frac{b_{s}}{k_{s}} K_{s}$ , shown on the ordinate. Adapted from [11]—published by The Royal Society of Chemistry.