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Inhibition by N36 and C34 peptides. The U87-CD4-CXCR4 cell inhibition assay and the mutant viruses are described in the legend to Fig. 2. Inhibition by the N36 peptide (A) and the C34 peptide (B) is shown. The measurement of C36 inhibition was extended to 1 fM of peptide (data not presented).
