Star Like Representation of Genome Relationships. The diagram depicts pairwise comparisons among thirteen genomes. Every genome is represented as a point on the perimeter of a circle. The thickness of the line connecting two genomes reflects the percentage of shared genes between the genomes. The thickest line connecting Aquifex aeolicus and Thermotoga maritima corresponds to 51% shared genes, and the thinnest line connecting Aeropyrum pernix and Borrelia burgdorferi corresponds to 9% shared genes. A gene is considered shared when it had a BLAST hit in the other genome with an E-value below 10-8. The percentage of genes shared between genomes A and B is calculated as ((#of genes in A shared with B/total # of genes in A)+(# of genes in B shared with A/total # of genes in B))/2. Bacteria are depicted in green, Archaea in red and Eukaryotes in blue. The domain affiliation is also indicated by a letter following the species name (A: Archaea, B: Bacteria, and E: Eukaryotes).