Figure 1.

Distribution of conservation scores in promoter alignments. (a) Pairwise promoter alignments of human-rodent and mouse-rat non-orthologous genes (control set II) with different promoter GC content. (b) Pairwise promoter alignments of most conserved promoter pairs and randomly selected 1 kb sequence pairs (control set I). (c) Alignments of mouse-rat and human-rodent homologous promoter pairs. (d) Three-way promoter alignments of homologous promoter triplets and sequence triplets from control set II.