Fig. 1. The fraction of non-protein-coding DNA and megabases of protein coding sequence (CDS) per haploid genome in different species. (A) The ratio of the total bases of non-protein-coding to the total bases of genomic DNA per sequenced genome across phyla (i.e. the fraction of non-protein-coding DNA). The four largest prokaryote genomes and two well-known bacterial species are depicted in black. Single-celled organisms are shown in gray, organisms known to be both single and multicellular depending on lifecycle are light blue, basal multicellular organisms are blue, plants are green, nematodes are purple, arthropods are orange, ascidians are yellow, and vertebrates are red. Species names are listed below B. (B) The amount (in megabases) of CDS per genome for species ranked by fraction of non-protein-coding DNA. Figure adapted from Taft et al. (Taft et al., 2007) with permission from BioEssays.