Figure 4. Splicing error rate correlates with intron length.

We divided all introns that are bounded by highly conserved splice sites into 100 bins based on length. We then calculated, in each bin, the mean fraction of sequencing reads from either splice site to an unconserved splice site. Plotted is this mean against the of the mean intron length (in base pairs) of introns in the bin. In red is a spline fit to these points.