Spatial regularity control in Model B6.

<p>(A) The eigenvalues are shown for continuous values of <i>ν</i> in different values of <i>D</i>_<i>x</i> (<a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1006065#pcbi.1006065.e078" target="_blank">Eq 43</a>). (B–D) The parameter condition that the equilibrium becomes unstable is shown by shaded area in <i>D</i>_<i>x</i>−<i>D</i>_<i>a</i> (B), <i>V</i>−<i>m</i> (C), and <i>r</i>−<i>m</i> (D) planes (<a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1006065#pcbi.1006065.e079" target="_blank">Eq 44</a>). Broken lines indicate <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1006065#pcbi.1006065.e080" target="_blank">Eq 45</a> for different values of <i>L</i>_*. Regulatory functions as in <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1006065#pcbi.1006065.g008" target="_blank">Fig 8</a> (<i>θ</i>(<i>a</i>_<i>i</i>) = 2<i>a</i>_<i>i</i>^<i>r</i>/<i>a</i>_<i>eq</i>^<i>r</i> + <i>a</i>_<i>i</i>^<i>r</i>), , and ) are used with parameter values of <i>K</i> = 2, <i>A</i> = <i>E</i>_<i>p</i> = <i>E</i>_<i>q</i> = 1.0, and <i>G</i>_<i>a</i> = 0.2 (A–D), <i>p</i> = <i>q</i> = 2.0 (A) or 10.0 (B–D), <i>D</i>_<i>a</i> = 0.1 (A) or 1.0 (C and D), <i>D</i>_<i>x</i> = 5.0 (C and D), <i>G</i>_<i>x</i> = 0.5 (A), 1.0 (B), or 5.0 (C and D), <i>V</i> = 0.1 (A) or 1.0 (B and D), <i>r</i> = 2.0 (A and B) or 4.0 (C), and <i>m</i> = 6.0 (A) or 5.0 (B).