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Signatures of positive selection across the ADH gene region in the pooled Ethiopian Semitic/Cushitic population (n = 220). (a) Di statistic and (b) iHS scores show a ∼1.5 Mb region of elevated scores across the ADH region. Red line denotes genome-wide empirical 99.5th percentile for each statistic, and nonsynonymous mutations discussed in the main text are highlighted with red arrows.
