Figure 4

Neighbor-joining trees of maternal 4403 env sequences from longitudinal plasmas samples. Full-length maternal env sequences generated by SGA from third trimester pregnancy and follow-up visits up to 12 weeks postpartum were aligned and plotted as radial Neighbor-joining trees. Clusters of monotypic and low-diversity sequences are encircled; the number of nucleotides by which these sequences differ from MRCA (branch node) is indicated for each cluster. The scale bar represents 0.01 nucleotide substitutions per site (1% divergence).