Fig. 1
Phylogenetic analysis based on the alignment of 249 nucleotides of the pro gene of samples from Pará (♦) with reference strains from the Los Alamos database. The sequence SIVCPZgab was used as an outgroup. The tree was constructed using the Kimura 2-parameter neighbor-joining (NJ) method. The numbers on the nodes of the tree indicate the bootstrap value obtained using 2000 replicates. The scale bar represents a difference of 2%