High abundance background sites are common and reproducible between different PAR-CLIP background gel slices. Area-proportional elliptical Venn diagrams of reads from three background samples isolated from different sizes on SDS-PAGE gel. A) All sites with one or more reads displayed. B) Sites with five or more reads displayed. C) Sites with 25 of more reads displayed.
Friedersdorf and Keene Genome Biology 2014 15:R2 doi:10.1186/gb-2014-15-1-r2