Figure 3.

Numbers of annotated ERVs in equal-sized bins across transcriptional units. Ten bins, numbered 0 to 9, were considered within transcribed regions. Four bins, two in either direction outside gene borders and equal in length to intragenic bins, were considered, and are shown as bins -2 and -1 upstream and +1 and +2 downstream. For some ERV families, bins were combined to obtain sufficient numbers for analysis.