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Effect of Vpr alleles on viral infectivity in nondividing HeLa-CD4-LTR/β-gal cells. G2-growth-arrested HeLa-CD4-LTR/β-gal cells were infected with HIV-1 variants containing the indicated mutations at an MOI of 0.05 TCID50/cell. Viral infectivity was determined by MAGI assay as described in the legend to Fig. 4.
