FIG. 5.

Phylogenetic relationship of SIVdeb strains to other primate lentiviruses. Midpoint-rooted maximum-likelihood trees were inferred from protein sequence alignments. The numbers on internal branches indicate estimated posterior probabilities (only values of 95% or greater are shown); the scale bars indicate 0.1 (Gag and Pol) and 0.2 (Env) substitutions per site. SIVs from Cercopithecus species (excluding the C. lhoesti group, whose taxonomic classification has been disputed [74]) are shown in red, including three new sequences obtained in this study (boxed).