FIG. 1.

Phylogenetic tree of HIV-1 capsid amino acid sequences. Thai (A) and Chinese (B) sequences are highlighted in a phylogenetic tree of all the analyzed sequences. The black circle and black diamond indicate NL4-3 (subtype B) and NH1 (CRF01_AE), respectively. Blue parentheses indicate clusters consisting of Thai (A) or Chinese (B) sequences only. Red parentheses indicate clusters consisting of both Thai and Chinese sequences. For (A), unfilled triangles are sequences reported before 2000; red, black, blue, and green triangles are sequences collected in 2005, 2007, 2009, and 2011, respectively. For (B), sequences are designated by their NCBI accession numbers, with x's indicating digits that varied depending on specific isolate number (see Supplementary Table S2). Unfilled diamonds indicate the CRF01/B recombinants.