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Codon-specific tests for positive selection of CenH3 genes. Tests were inferred by mixed effects model of evolution (MEME) using the likelihood ratio test (LRT). LRT values with P values <0.1 were considered as codons under positive selection (red stars) (source data are supplied in the supplementary table 5, Supplementary Material online). Multiple alignments of CenH3 genes used for analyses are shown in supplementary figure 2, Supplementary Material online.
