genetic characterization of hiv-1 bc recombinants and evolutionary history of the crf31_bc in southern brazil. | to evaluate the recombination profiles and evolutionary history of hiv-1 bc recombinants in southern brazil, 81 isolates collected in the city of porto alegre (rio grande do sul state) from 1998 to 2006 previously subtyped as c (env-gp120/c2v3) were screened in the protease-reverse transcriptase (pr/rt), integrase and gp41 genomic regions. detailed phylogenetic, bootscan and informative site analyses were performed to trace the subtype classification. the evolutionary rate and divergence time of ... | 2009 | 19460312 |