FIG. 4.

Expression of CMV gB and gH/gL in U373 cells. U373 glioblastoma cells were either mock transduced (panel A), transduced with a retrovirus encoding gB (panel B), or transduced with retroviruses encoding gH and gL (panel C). Transduced cells were allowed to form syncytia, fixed, and stained with Giemsa stain to visualize multinucleated cells. Photographs show representative fields of each experimental group (magnification, ×200). Arrows call attention to multinucleated syncytia within each panel.