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Effect of SDF-1α (1 μg/ml) on NL4.3 wild-type (A, B, and C) and SDF-1αres (D, E, and F) HIV-1 replication in MT-4 cells, as monitored by anti-gp120 MAb binding. Cells were infected with the virus strains at 100 CCID50 and stained 4 days after infection with MAb NEA9305. The percentage of gp120-positive cells (HIV-1-infected cells) is indicated in each histogram. In panels A and D, cells were stained with the secondary antibody only.
