The DNA content was analyzed in nuclei isolated from uninfected or HHV-7–infected (12 days p.i.) SupT1 cells by flow cytometry after staining with propidium iodide. The X axis, in a logarithmic scale, shows the DNA content determined based on fluorescence due to propidium iodide staining, and the Y axis reflects the relative number of cells. These results are representative of three separate experiments.