Figure 1.

Reduced susceptibility of EU CD4 T cells to infection by pseudotyped HIV-1. CD4 T cells were challenged with HIV-1 particles pseudotyped with R5 (BaL) (white bars), X4 (HxB2) (black bars) or pantropic (VSV-G) (patterned bars) envelope glycoproteins. Results (mean of three experiments) are expressed as relative luciferase activity in cell lysates three days after infection. Luciferase activity in cell lysates from a representative control was attributed a value of 100%. Error bars representing standard deviation are shown in each case.