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Amino acid sequences for a series of approximately 20-mer overlapping peptides spanning the C1 to C5 domains of gp120 derived from the isolate HIV-1W61D. The V1/V2 and V3 domains are located within peptides p9 to p18 and p25 to p29, respectively. Note that there was no available overlapping peptide to link the contiguous sequences represented by peptides p18-p19 and p21-p22.
