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Purifying selection of ENVV2 sequences. (A) The ENVV2 reading frame (blue) is intact in all five primate genomes and shows a higher alignment similarity than the flanking regions. (B) Analysis of ENVV2 proteins, hydrophobicity plot for eight primate sequences. The most likely site specific dN/dS ratios are shown for the accepted model incorporating two classes of dN/dS ratios (red) and the non-significant model of positive selection incorporating three classes (grey).
