Relationship between cellular response and behavioral variability in bacterial chemotaxis

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Original Entry: Tom Dimiduk APPHY, Fall 2010

Relationship between cellular response and behavioral variability in bacterial chemotaxis Thierry Emonet† and Philippe Cluzel Proceedings of the National Academy of Sciences

Soft Matter Keywords

Random Walk, Fluctuation Dissipation, Population Behavior

Summary

This article discusses how amplification of noise in an enzyme system is used to drive the bacteria's stochastic response to nutrient gradients. The authors find that hypersensitivity to these fluctuations actually provides beneficial behaviors both for allowing single bacteria to progress rapidly up gradients and for allowing populations to explore a large area. Finally, the dynamics of bacteria in response to stimulus can be inferred from their spontaneous fluctuations in the absence of stimuli.