Prog. Theor. Phys. Supplement No.161 (2006) pp. 251-254
Relation between Adaptation and Irreversible Circulation in Bacteria Chemotaxis
1Department of Physics, Graduate School of Science,
The University of Tokyo, Tokyo 113-0033, Japan
2Department of Pure and Applied Science, College of Art and Sciences,
The University of Tokyo, Tokyo 153-8902, Japan
3Department of Physical Science, Graduate School of Science,
Hiroshima University, Higashi-Hiroshima 739-8526, Japan
(Received July 1, 2005)
We provide a framework to study an effect of fluctuations
in intracellular biochemical networks responsible for adaptation dynamics
of bacteria. We use a 4 state chemoreceptor model,
and investigate the dynamics and fluctuation.
Analyzing fluctuation induced by extrinsic noise,
we show a crucial relationship between the
adaptation dynamics and the fluctuation;
Adaptation precision of the system can be described by two quantities,
normal fluctuation and irreversible circulation. This theorem means that
we can predict how precisely bacteria adapt against external stimuli,
by measuring state fluctuation of the chemoreceptor,
without directly giving stimuli to them.
DOI : 10.1143/PTPS.161.251
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