Some rules in the ordering of nucleotides in the DNA.
Natural DNA sequences contain distinct nearest neighbor patterns. Eukaryotic as well as prokaryotic sequences show a consistent hierarchy in the frequencies of appearance of most doublets.
D000818:Animals; D001483:Base Sequence; D004247:DNA; D005814:Genes, Viral; D006801:Humans; D008433:Mathematics; D013045:Species Specificity
D004247:DNA