This animation illustrates the formation of spiral waves of cAMP
from random inital "firing" of individual species of starved Dictyostelim
. We employed an automata-like model for the discrete set of
"bions" emitting the chemical, and diffusion equation for the
concentration of chemical
(for details, see
Genetic feedback governs cAMP spiral
wave formation in Dyctiostelium submitted to
the Proceedings of The National Academy of Sciences USA). Notice how initially disordered fluctuations of cAMP
create many small spiral "seeds" which then compete among each other and
eventually only few (or just one, as in this case) survive. This spiral
competition can be also traced in a generic three component reaction-diffusion
Spiral competition in three component
To restart the animation just reload this page.
(animation using Netscape server push capability, C code courtesy of Paul Ramsey)
You can also watch regular MPEG animations of cAMP spiral formation and related amoebae aggregation.