Figure 2From: Complex organizational structure of the genome revealed by genome-wide analysis of single and alternative promoters in Drosophila melanogasterThe mononucleotide distribution of the three different classes of fly promoters. Shown are unique promoters (black), first alternative promoters (red), the downstream alternative promoters (green). The mean frequency of each nucleotide was calculated in a 10 bp window sliding across the promoter region in 1 bp steps.Back to article page