Nucleotide conservation between the orthologous promoters in all four sensu stricto species was determined by sliding a 25 bp window across aligned promoter sequences. The average percent identity at any position is plotted as a function of distance from the starting ATG codon.

A.  Profile of nucleotide conservation for all promoters.

B.  Profiile of nucleotide conservation for long promoters (those with intergenic regions longer than 1000 bp.

C.  Comparisons of different classes of promoters