CG nucleotide bias in bidirectional promoters. (A) C+G content plotted as a histogram of the dinucleotide density. Plots are stacked with bidirectional promoters on top and Tail_to_tail regions on the bottom. (B) The CpG-island content of these same categories of promoters.
Yang and Elnitski BMC Genomics 2008 9(Suppl 2):S3 doi:10.1186/1471-2164-9-S2-S3