Additional file 1.

Phylogenetic tree including 350 partial env sequences from 8 animals. Taxa names include the animal number, the tissue from which the sequence was obtained and the clone number. Tissues are identified by a three-letter code as follows: broncho-alveolar macrophages BAL, choroid plexus CPx, spinal cord SCO, peripheral blood mononuclear cells PBM, mammary gland MGL, lung LUN. Animal clusters are depicted in different colors. Sequences presenting stop codons within the 698 animal clade are reported in gray. Posterior probability supporting tree's nodes are reported.

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Ramírez et al. BMC Veterinary Research 2012 8:8   doi:10.1186/1746-6148-8-8