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Base composition (% of A (blue) T (red) C (blue) G (red) nucleotides) of the clusters in the human chromosomes 1, 2, 3, 4. For each chromosome, the plots refer to windows n = 2, n = 4, n = 10. Data refers to the first 10Mbases of each chromosome. See Tables S1–S6 of Supplementary Information for further estimates.
