Figure 4From: Near full-length genome analysis of low prevalent human immunodeficiency virus type 1 subclade F1 in São Paulo, BrazilMaximum likelihood tree of South American F1 and BF1 recombinant strains (Black squares) and reference strains (location is shown in each sequence name) inferred from C2-C3 env region. Gray circles show the newly sampled strains from Brazil. Trees were rooted using HIV-1 HXB2 isolate. The approximate likelihood-ratio test (aLRT) values of ≥ 70% are indicated at nodes. The scale bar represents 0.01 nucleotide substitution per site.Back to article page