Figure 4

Reads aligning around the low complexity region 16,184 to 16,190. Set A: a set of random reads aligning across the region with no quality filtering performed. Set B: bridging reads; these were selected by requiring the low complexity region (positions 16,184 to 16,190) to be in the middle of the read. Set C: high quality reads containing indels; these were required to align across positions 16,184 to 16,190 and contain ten aligning high quality bases (phred value of 30 or higher) on each side of the indel.