Relationships among species-specific cis-regulatory motif sets. (a) Species are related by comparisons of cis-regulatory motif vectors as described in the text. Individual sets of promoters are grouped by species, which are then ordered by similarity along each axis. Pair-wise correlations between species vectors are color coded according to the scale bar shown. (b) Randomized promoter sets preserving both mono- and dinucleotide sequence composition is shown for comparison.
Mariño-Ramírez et al. Genome Biology 2006 7:R122 doi:10.1186/gb-2006-7-12-r122