Distribution and diversity of EVEs identified by <i>in silico</i> screening.

Footnote: Groups that have been reported as mediating their own integration are highlighted in bold. Asterisks denote families with representatives known to be capable of establishing persistent/latent infection. EVE insertions were considered to represent complete viral genomes or genes if more than 90% of the species-specific gene/genome was identified. Orthologous insertions in distinct species were not counted as distinct elements. Sequences that were identified by BLAST, but where the region used in phylogenetic trees did not match any viral sequences in reciprocal BLAST searches, were defined as unclassifiable. a Numbers in parentheses indicate complete genomes.