Biology – Quantitative Biology – Genomics
Scientific paper
2004-12-18
Biology
Quantitative Biology
Genomics
4 pages, 3 tables, 2 figures
Scientific paper
10.1103/PhysRevLett.94.178103
Shannon information (SI) and its special case, divergence, are defined for a DNA sequence in terms of probabilities of chemical words in the sequence and are computed for a set of complete genomes highly diverse in length and composition. We find the following: SI (but not divergence) is inversely proportional to sequence length for a random sequence but is length-independent for genomes; the genomic SI is always greater and, for shorter words and longer sequences, hundreds to thousands times greater than the SI in a random sequence whose length and composition match those of the genome; genomic SIs appear to have word-length dependent universal values. The universality is inferred to be an evolution footprint of a universal mode for genome growth.
Chang Chang-Heng
Chen Hong-Da
Hsieh Li-Ching
Lee Hoong-Chien
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