FIG 10.

Sequence conservation and evidence for purifying selection of syncytin-Mar1 in the tribe Marmotini. (Left) Maximum-likelihood phylogenetic tree determined using amino acid alignment of the Syncytin-Mar1 proteins identified in Fig. 9 and inferred with the RaxML software. The horizontal branch length and scale indicate the percentage of amino acid substitutions. The percent bootstrap values obtained from 1,000 replicates are indicated at the nodes. (Right) Double-entry table for the pairwise percentage of amino acid sequence identity between the Syncytin-Mar1 proteins among the indicated species (lower triangle) and the pairwise Nei-Gojobori dN/dS ratio (upper triangle). A color code is provided below the table for both series of values.