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Phylogenetic relationship of BV genotypes based on the US4 gG coding sequences. Predicted amino acid sequences were aligned and phylogenetic analyses performed as described previously (35). The tree shown was generated by using gamma distance estimates and neighbor-joining tree construction. Values represent bootstrap confidence intervals. BV genotypes isolated from rhesus (BVrh), cynomolgus (BVcy), lion-tailed (BVlt), and pigtailed (BVpt) macaques are indicated.
