Abstract

The paper reviews the conversion of symbolic DNA sequences into complex genomic signals and presents some new results in the phase and fractal analyses of genomic signals. Long-range correlations in the first and second order statistics, extending over distances of hundreds of thousands - to tens of millions of base pairs, i.e., up to the scale of whole chromosomes, have been identified by phase analysis. It is inferred that these features have a functional role in the control of crossing-over and in species separation. The long range correlations can also be seen in a fractal-like structure of the genomic signals. Fractal dimensions of about 1.1 have been found for the cumulated phase genomic signals.

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