FIG. 2.

Effect of exogenous nucleosides on cell cycle. Cell cycle analysis of unstimulated (upper panels) and costimulated (lower panels) cells cultured in the absence or presence of increasing concentrations of exogenous nucleosides (nuc) for 2 days. The different phases of the cell cycle are shown in the lower left panel. Percentages of cells at the different phases of the cell cycle are indicated inside the respective quadrants for each of the conditions. 7AAD, 7-amino-actinomycin D. PY, pyronin Y.