Figure 1

Amino acid alignment of V3 sequences. The consensus sequence from each sample was generated and aligned with HXB2 (Accession number: K03455). Amino acid positions appear at the top of alignment. Position 316 and 323, corresponding to the third position of the codon encoding the amino acid at position 11 and 25 of the V3 loop. Dots indicate identities whereas tildes indicate deletions