Figure 2. Spatially resolved Ca2+ dynamics.
An initial puff induces  release of adjacent clusters by diffusion and
 release of adjacent clusters by diffusion and  induced
 induced  release leading to a global
 release leading to a global  spike. The puff to spike transition is visualized by the iso-concentration surface of 2
 spike. The puff to spike transition is visualized by the iso-concentration surface of 2  during a spike. Time is indicated on the panels (see Video S1).
 during a spike. Time is indicated on the panels (see Video S1).
