Abstract
A new method of quantifying correlations in symbolic sequences is applied to DNA nucleotides. Spectral density measurements of individual base positions demonstrate the ubiquity of low-frequency 1/ noise and long-range fractal correlations as well as prominent short-range periodicities. Ensemble averages over classifications in the GenBank databank (primate, invertebrate, plant, etc.) show systematic changes in spectral exponent β with evolutionary category.
- Received 18 February 1992
DOI:https://doi.org/10.1103/PhysRevLett.68.3805
©1992 American Physical Society