Figure 2From: High-resolution deep sequencing reveals biodiversity, population structure, and persistence of HIV-1 quasispecies within host ecosystemsOrganization of viral populations. Unrooted neighbor-joining trees were developed for each pyrosequencing data set clustered at 3% pairwise distance. Symbols represent the proportion of total pyrosequences in a cluster: empty circle, ≤ 0.25%; black inverted triangle, > 0.25% to 1%; black square, > 1% to 10%; star, > 10%.Back to article page