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Comparisons of median Ka (filled circles), Ks (filled triangles), and Ka/Ks (open diamonds) values of human genes and their closest counterparts in chimpanzee in (A) HS/CS expansion, HS/CS contraction, and H=C=M families; and (B) the C>H>M, all CS expansion (C>H≥M), C>H=M, and H=C=M families. Error bars represent the standard errors.
