Genetic subtypes and evolutionary relationships of the viruses sequenced in this study.

<p>Maximum likelihood phylogenetic trees of PR (A) and RT (B) regions were constructed with reference sequences from all HIV-1 subtypes and sub-subtypes (empty circles) and with the Angolan sequences (filled circles). In each tree, the aLRT values supporting the internal branches defining a subtype or a sub-subtype are shown. The scale represents number of base substitutions per site.