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PNG combinations within the Env quasispecies members of each macaque at 32 weeks postinfection. Each horizontal bar corresponds to a combination of PNG changes that exists within the quasispecies of each animal. The number of clones with a given combination is shown to the left of the bars. The position of each PNG is shown along the top. If the PNG is present, it is shown as a vertical line. Identical combinations found within different animals are denoted with symbols on the right.
