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The HIV RNA+/ Ab- envelopes are not related to the virologically linked early and chronic infection variants. Full-length HIV-1 envelope sequences were aligned with subtype reference sequences from the Los Alamos database using Clustal X. Maximum likelihood phylogenies were generated using Paup with parameters from FindModel best fit evolutionary model as described previously [21]. Subject IDs are noted with the different color nodes representing sequences from the 3 groups.
