Conditions for Chemotactic Aggregation

Details Conditions for Chemotactic Aggregation Conditions for Chemotactic Aggregation

2007-10-30

arxiv.org/abs/0710.5599v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures

Scientific paper

Micro-organisms aggregate through chemotaxis against a concentration gradient of signals secreted by themselves. We have numerically studied a model consisting of elements with intracellular dynamics, random walks with a state-dependent turnover rate, and secretion of attractant. Three phases with and without aggregation, as well as partial aggregation, were obtained as to the diffusion and decomposition rates of the attractant, and conditions for cellular aggregation were analyzed. The size of aggregated clusters was shown to be independent of cell density, as is consistent with experiment.

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