Volume 62, Number 2, April 2003
|Page(s)||271 - 277|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 April 2003|
Scaling violations in coding DNA
Department of Theoretical Physics, Indian Association for the Cultivation of Science
Calcutta 700 032, India
2 Department of Statistics, Burdwan University - Burdwan 713 104, India
3 S.N. Bose Centre for Basic Sciences, Block-JD, Sector 3 Salt Lake, Calcutta 700 098, India
Corresponding author: firstname.lastname@example.org
Accepted: 19 February 2003
DNA sequences are known to scale like fractals. We study coding DNA and find, however, that these are not characterised by a single scaling index. The behaviour changes, somewhat abruptly, at about a few hundred bases. We study the Discrete Fourier Transform and find that the index-change appears in the plot of power spectrum vs. frequency. Interestingly, an enhancement of the spectral density is observed in the region of the index change. We study the peak heights at a frequency of as a function of the length scale and find, once again, changes in the scaling index near these critical lengths.
PACS: 82.35.Pq – Biopolymers, biopolymerization / 87.14.-g – Biomolecules: types / 02.50.Ey – Stochastic processes
© EDP Sciences, 2003
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