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. 2012 Aug 10;7(8):e42508. doi: 10.1371/journal.pone.0042508

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© 2012 Vigelius, Meyer

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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Inline graphic — We display the nullclines of the concentration (blue curve), which can be regarded as the activator, and the fraction of open channels (brown curve) for the Calcium oscillation model in the deterministic limit [Eqs. (27)–(29)] for the parameter set given in Table 7 and assume that diffusion is switched off. The blue (brown) arrow illustrates the gradient in phase space of the activator (inhibitor) on either side of the nullcline and the fix points are marked with . We plot an example trajectory (dashed curve) of a larger perturbation from the homogeneous state . Starting at point , the system relaxes towards via a long excursion.

We display the nullclines of the concentration (blue curve), which can be regarded as the activator, and the fraction of open channels (brown curve) for the Calcium oscillation model in the deterministic limit [Eqs. (27)–(29)] for the parameter set given in Table 7 and assume that diffusion is switched off. The blue (brown) arrow illustrates the gradient in phase space of the activator (inhibitor) on either side of the nullcline and the fix points are marked with . We plot an example trajectory (dashed curve) of a larger perturbation from the homogeneous state . Starting at point , the system relaxes towards via a long excursion.