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Growth kinetics of WT HIV-1 YU-2 versus those of the ΔCT envelope variant. After a 3-day stimulation with phytohemagglutinin, peripheral blood mononuclear cells were infected with WT or ΔCT virions at a multiplicity of infection of 0.005 and cultured for 10 days. Aliquots (200 μl) were collected daily, and the p24 level was determined to monitor the virus yield.
