Fig. 2.

Endogenous DNA content in enriched libraries. Percentage of the unique retained reads that aligned to the human genome in (a) Saint Martin and (b) Puerto Rico samples. “STM” stands for Saint Martin and “PI” for Paso del Indio, Puerto Rico. The percentages in parentheses below the x-axis indicate the number of down-sampled reads per library. The error bars represent 95% confidence intervals of endogenous DNA content found in the samples across the 10 down-sampled replicates. Darker colors correspond to the proportion of the unique reads that aligned to the Y chromosome. Whole-genome enriched libraries have < 0.04% reads aligning to the Y chromosome