Distribution of MLV and SIV Integration Sites within a 60-kb Window Centered on Transcription Start Sites

The vertical arrow points to 0 kb. Each gray bar corresponds to the percentage of SIV integration sites within a 5-kb interval, and black bars correspond to the percentages of MLV integration sites in a 5-kb interval. The distribution of a set of 65,000 in silico–generated random integration sites is represented by the dashed line. (Source: [9].)