Abstract:
:DNA sequences have been analysed using models, such as an n-step Markov chain, that incorporate the possibility of short-range nucleotide correlations. We propose here a method for studying the stochastic properties of nucleotide sequences by constructing a 1:1 map of the nucleotide sequence onto a walk, which we term a 'DNA walk'. We then use the mapping to provide a quantitative measure of the correlation between nucleotides over long distances along the DNA chain. Thus we uncover in the nucleotide sequence a remarkably long-range power law correlation that implies a new scale-invariant property of DNA. We find such long-range correlations in intron-containing genes and in nontranscribed regulatory DNA sequences, but not in complementary DNA sequences or intron-less genes.
journal_name
Naturejournal_title
Natureauthors
Peng CK,Buldyrev SV,Goldberger AL,Havlin S,Sciortino F,Simons M,Stanley HEdoi
10.1038/356168a0keywords:
subject
Has Abstractpub_date
1992-03-12 00:00:00pages
168-70issue
6365eissn
0028-0836issn
1476-4687journal_volume
356pub_type
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