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Figure 4 | BMC Evolutionary Biology

Figure 4

From: High variability and non-neutral evolution of the mammalian avpr1a gene

Figure 4

Maximum likelihood tree inferred from the nucleotide sequences of exon 1 of the arginine-vasopressin 1a receptor gene for various mammalian taxa. Bootstrap values > 50 are shown for the maximum likelihood method above branches and for neighbour-joining below branches. Positively selected sites (ω > 1) are shown in black circles. Note that most of these sites are found in the G-protein binding domain (231–274). Only two positively selected sites (191; 228) were detected outside this domain in two species (O. aries and C. familiaris).

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