Simulated Intracellular Calcium waves 

At lower concentration of IP3 the wave is abortive. The model accounts for clustering of calcium channels in the ER membrane and random spatial distribution of these clusters
 
abortive wave
  
wave at the threshold 
of stability

A. Bugrim, A.M. Zhabotinsky and I.R. Epstein, "Calcium Waves in a Model with a Random Spatially Discrete Distribution of Ca2+ Release Sites,"
Biophys. J. 73, 2897-2906 (1997).

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