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Stability and noise in biochemical switches

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arxiv cond-mat/0005235 v1 pith:W2XP5FQ5 submitted 2000-05-15 cond-mat.soft cond-mat.dis-nnnlin.AOphysics.bio-phq-bio.MN

classification cond-mat.softcond-mat.dis-nnnlin.AOphysics.bio-phq-bio.MN
keywords noiseswitchesbiochemicalmoleculesstabilityanalysisbacteriabiology
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Many processes in biology, from the regulation of gene expression in bacteria to memory in the brain, involve switches constructed from networks of biochemical reactions. Crucial molecules are present in small numbers, raising questions about noise and stability. Analysis of noise in simple reaction schemes indicates that switches stable for years and switchable in milliseconds can be built from fewer than one hundred molecules. Prospects for direct tests of this prediction, as well as implications, are discussed.

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Cited by 1 Pith paper

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    A minimum action principle for far-from-equilibrium discrete-state systems unifies fluctuation relations and non-quadratic thermodynamic-kinetic uncertainty bounds via a single inferred-entropy-production rate functional.

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