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Chin. Phys. B, 2010, Vol. 19(3): 030503    DOI: 10.1088/1674-1056/19/3/030503
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Stochastic resonance in the gene transcriptional regulatory system subjected to noises

Wang Can-Jun(王参军)
Nonlinear Research Institute, Baoji University of Arts and Sciences, Baoji 721007, China
Abstract  We have investigated in the adiabatic limit the phenomenon of stochastic resonance in the gene transcriptional regulatory system subjected to an additive noise, a multiplicative noise, and a weakly periodic signal. Using the general two-state approach for the asymmetry system, the analytic expression of signal-to-noise ratio is obtained. The effects of the additive noise intensity α, the multiplicative noise intensity D and the amplitude of input periodic signal A on the signal-to-noise ratio are analysed by numerical calculation. It is found that the existence of a maximum in the RSNR--$\alpha$ and RSNR--D plots is the identifying characteristic of the stochastic resonance phenomenon in the weakened noise intensity region. The stochastic resonance phenomena are restrained with increasing $\alpha$ and D, and enhanced with increasing A.
Keywords:  gene transcriptional regulatory system      stochastic resonance      noises  
Received:  24 May 2009      Revised:  30 August 2009      Accepted manuscript online: 
PACS:  05.40.Ca (Noise)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No.~10865006), the Science Foundation of the Education Bureau of Shaanxi Province of China (Grant No.~09JK331) and the Science Foundation of Baoji University of Science and Arts of China (Grant No.~Zk0834).

Cite this article: 

Wang Can-Jun(王参军) Stochastic resonance in the gene transcriptional regulatory system subjected to noises 2010 Chin. Phys. B 19 030503

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