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Early replicating viruses in viremic (FH84) and aviremic (DE37) R5 SHIVSF162P3N-infected macaques. A phylogenetic tree shows the relationship between Env variant sequences (V3 to V5) in plasma of macaques FH84 and DE37 at the first viral RNA-positive time point (2 wpi). A neighbor-joining tree rooted on the sequences of HxB2 and SF162 was generated. The scale bar indicates the genetic distance along the branches in nucleotides.
