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gp120 and gp41 sequences from the HIV-1 NL4-3 and Arwt45B2 and the recombinant strains generated. Arwt45B2 is the virus obtained after passages in parallel to ARA49 and ARA45C in the absence of ADS-J1. Arwt45B2 was used as the complementary moiety to the ADSJ-1-resistant portion in the generation of the recombinant strains. The numbering corresponds to the HXB2 HIV-1 strain. Variable loops of gp120 are indicated by boxes.
