Figure 2.

Phylogenetic trees of HIV-1 subtypes B and C. Maximum likelihood (ML) phylogenetic tree of HIV-1 subtypes B (a) and C (b) sequences based on 300 nucleotide sites of Tat gene sequence generated through the Los Alamos database. GTR+I+γ5nucleotide substitution model was employed with 1000 bootstrapped data by MEGA 6. The reference Tat sequences were downloaded from the Los Alamos database showed in round bullet. SIV sequence (Ref.CPZ.US.85.US_Marilyn.AF103) was used to root the tree showed in red square bullet