Paralog distribution in completely sequenced archaeal genomes. (a) The average number of paralogs in arCOGs for completely sequenced archaeal genomes. The arrows point to the vales for N. equitans and I. hospitalis genomes, respectively. (b) Paralog density in completed genomes of species from the order Desulfurococcales and in N. equitans, determined by blastclust using a variable identity threshold over at least 50% of the aligned pairs of sequences.
Podar et al. Genome Biology 2008 9:R158 doi:10.1186/gb-2008-9-11-r158