On a Condition for Intracellular Adaptive Dynamics for Chemotaxis

Details On a Condition for Intracellular Adaptive Dynamics for Chemotaxis On a Condition for Intracellular Adaptive Dynamics for Chemotaxis

2005-11-17

arxiv.org/abs/cond-mat/0511422v1

Physics

Condensed Matter

Statistical Mechanics

6 pages, 5 figures

Scientific paper

10.1103/PhysRevE.74.011903

Microorganisms often perform chemotaxis, (i.e., sensing and moving toward a region with a higher concentration of an attractive chemical) by changing the rate of tumbling for random walk. We studied several models with internal adaptive dynamics numerically to examine the validity of the condition for chemotaxis proposed by Oosawa and Nakaoka, which states that the time scale of tumbling frequency is smaller than that of adaptation and greater than that of sensing. Suitably renormalizing the timescales showed that the condition holds for a variety of environments and for both short- and long-term behavior.

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