Fig. 2.
Maximum clade credibility tree for the gp41 locus. (A) Radial tree layout with tips names removed for clarity. (B) Polar tree layout with the width of the branches representing Bayesian posterior probabilities (values above 0.9 are symbolized with dark green nodes circles). In both layouts the accessions annotated as Cameroon are colored in dark green and sequences annotated as France are colored in orange. Dark green tip circles denote new sequences. Yamaguchi et al. (2002) clusters were indicated with yellow roman numerals. Scale bar for years.