Figure 2. Human- and archaic-specific fixed variants are enriched in circadian regulatory, promoter, and gene regions.
Human-specific fixed variants are significantly enriched compared to variants that are not fixed in circadian regulatory elements (Fisher’s exact: OR=1.25, P=8.39e-4) and gene regions (Fisher’s exact: OR=1.84, P=7.06e-12). Promoters show a similar enrichment, but the higher p-value is the result of the small number of variants (Fisher’s exact test: OR=1.21, P=0.65). Likewise, archaic-specific variants are enriched in circadian regulatory regions (Fisher’s exact: OR=1.16, P=6.15e-5) and gene regions (Fisher’s exact: OR=1.13, P=0.023), with the promoters showing a similar trend (Fisher’s exact test: OR=1.09, P=0.63). The numbers in parentheses give the counts of fixed variants observed in each type of element. Regulatory elements were defined based on the ENCODE candidate cis-regulatory elements.
