FIG. 3.
Proportions of ORFs with database homologues for large DNA viruses. (Top) A total of 139 viruses with genomes larger than 100 kbp. Filled and open circles correspond to 28 phages and 111 eukaryotic viruses, respectively. (Bottom) Magnified view for the viruses with the smallest proportions of ORFs with homologues. For the identification of homologues, we used a BLAST E value of 10−5, excluding self matches. Note that for viral genomes with closely related genomes represented in the databases, the proportions of ORFs with database homologues become large.