Fig. 3

Identification of the significant hotspots in env. Recombination hotspots were shown in red across the env gene. Each line represented a position, and the thickness of the colored regions represents consecutive positions. Position numbering is relative to HXB2. SP, signal peptide. FP, fusion peptide. NHR, N-terminal helix repeat region. CHR, C-terminal helix repeat region. TM, Transmembrane domain