Biology – Quantitative Biology – Quantitative Methods
Scientific paper
2011-04-04
Physics Letters A, 2011, V. 375, N 16, pp. 1729-1732
Biology
Quantitative Biology
Quantitative Methods
10 pages, 0 figures
Scientific paper
10.1016/j.physleta.2011.03.007
Periodic patterns play the important regulatory and structural roles in genomic DNA sequences. Commonly, the underlying periodicities should be understood in a broad statistical sense, since the corresponding periodic patterns have been strongly distorted by the random point mutations and insertions/deletions during molecular evolution. The latent periodicities in DNA sequences can be efficiently displayed by Fourier transform. The criteria of significance for observed periodicities are obtained via the comparison versus the counterpart characteristics of the reference random sequences. We show that the restrictions imposed on the significance criteria by the rigorous spectral sum rules can be rationally described with De Finetti distribution. This distribution provides the convenient intermediate asymptotic form between Rayleigh distribution and exact combinatoric theory.
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