Gene-to-pseudogene ratios. (a) The top 20 pseudogene families and top 10 gene families based on Pfam classification. Ranking is based on the size of pseudogene families. The top 10 gene families are highlighted with the green background. (b) The number of genes plotted against the number of pseudogenes in a Pfam family. The line represents the overall ratio of the number of pseudogenes to the number of genes in the 64 genomes.
Liu et al. Genome Biology 2004 5:R64 doi:10.1186/gb-2004-5-9-r64