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Molecular noise induced circadian oscillation and coherence resonance in the gene network of biological clock

Yi Ming Jia Ya Liu Quan Zhan Xuan

Molecular noise induced circadian oscillation and coherence resonance in the gene network of biological clock

Yi Ming, Jia Ya, Liu Quan, Zhan Xuan
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Publishing process
  • Received Date:  21 May 2007
  • Accepted Date:  23 May 2007
  • Published Online:  15 January 2008

Molecular noise induced circadian oscillation and coherence resonance in the gene network of biological clock

  • 1. 华中师范大学物理系和生物物理研究室,武汉 430079

Abstract: The molecular noise in the gene regulation network of biological clock in Drosophila was studied. Especially, we investigated the effect of molecular noise on the circadian rhythmic oscillation when the system is in the steady state region but only slightly away from the oscillating region. We show that (i) Though the prodution and the decay of the protein are stochastic with the stochastic time interval, the obvious circadian oscillation can be induced depending on the system intrinsic regulation mechanism. (ii) The coherence of molecular noise-induced oscillation is optimal under an appropriate molecular noise level, leading to the occurrence of coherence resonance.

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