Figure 4

Distribution of π ratios (πGC2H+HHZ/πSH527) and ZF ST values, which are calculated in 100-kb windows sliding in 10-kb steps. Sweep signals are located to the right of the vertical dashed lines (the 5% right tails of the empirical π ratio distribution, log2 π GC2H+HHZ /π SH527), and above the horizontal dashed line (the 5% right tail of the empirical ZF ST distribution, where ZF ST is 1.96).