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. Author manuscript; available in PMC: 2021 Aug 25.
Published in final edited form as: Science. 2021 Jan 22;371(6527):415–419. doi: 10.1126/science.aba0542

Fig. 3. A signature of ancient balancing selection.

Fig. 3.

Estimated rate of synonymous substitutions per site (dS) in 200-codon windows stepped every 10 base pairs between CBS2888 (alternative) and BY (reference) genes surrounding the galactose loci. (A to C) Genes adjacent to GAL1/10/7 (A), genes adjacent to the PGM1 promoter (B), and genes adjacent to GAL2 (C). The purple dashed line shows the genome-wide average dS of 0.014. The moderately elevated dS in some genes (SIC1 and KAP104) provides evidence of ongoing balancing selection (4).