PERVs in the WZSP genome. (A) Distribution of similarity between virus protein and its counterpart in WZSP genome by considering factors of sequence identity and coverage. (B) Structure of whole PERV genome inserted into the pig genome. The upper panel shows the sequencing depth of the assembled scaffold. The middle panel visualizes the paired-end alignment of the scaffold providing evidence of correct assembly. The bottom panel shows the genome structure of PERV and its integration site in the scaffold.