Figure 1

Periodograms of the distance distributions of 16 dinucleotides in E. coli genome. The complete nucleotide sequence of E. coli, as well as subsets of its coding and noncoding regions, was subjected to the positional autocorrelation analysis for all 16 dinucleotides separately. Resulting autocorrelation profiles were after that analyzed by Fourier transform. The black lines correspond to the whole genome, the blue curves – to the coding sequences, and the red curves – to the noncoding sequences.