Fig. (3) Phylogenetic analysis of env gene (C2-V3 region) of the HIV-1 strains isolated from the Nagaland IDU samples. The Nagaland IDU strains are denoted as “nag” ▼ and African strains as “●”.The accession number for env (C2-V3) sequences are nag 1 (HQ897961), nag 12 (EU 526665), nag 23 (HM 130667), nag 25 (HQ897956), nag 33 (HQ897957), nag 49 (EU 526663), nag 57 (EU 526659), nag 65 (EU 526660), nag 81 (HQ897958), nag 88 (EU 526661), nag 86 (EU 526662), nag 111 (EU 526664), nag 113 (HQ897962), nag 120 (EU 526666), nag 135 (EU 526669), nag 152 (HQ897959), nag 153 (EU 526668), nag 157 (HQ897960).

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