Neighbor-joining phylogenetic tree of HIV-1 <i>gag</i> P17–P24 gene of study samples from the Jilin province of northeastern China.

<p>Neighbor-joining phylogenetic trees were constructed for 134<b> </b>DNA sequences of HIV-1 <i>gag</i> P17–P24 and reference sequences. The 134 <i>gag</i> P17–P24 gene sequences were separated into two different neighbor-joining trees, Fig. 1A containing only the subtype A, CRF01_AE, CRF02_AG-related sequences and Fig. 1B representing the B/B’, C, CRF07_BC related sequences. The stability of each node was assessed by bootstrap analyses with 1000 replicates and only bootstrap values ≥70 are shown at the corresponding nodes. CRF01_AE, CRF02_AG, CRF07_BC and CRF08_BC are labeled CRF01, CRF02, CRF07 and CRF08, respectively, for simplicity. The seven unique CRF01_AE lineages detected in China are labeled CRF01-1 through CRF01-7 and the Central African CRF01_AE sequences are labeled CRF01-CF. The two distinct CRF07_BC lineages identified among MSM are labeled CRRF07-1 and CRF07-2. The asterisk (*) next to sequence name indicates the identified recombinant or discordant genotype in the study. The symbols representing the risk groups are shown at the top-left corner of the figure.