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Expression of GFP-TRAIL in brain tumor cells: (A) Meningioma cells and (B) Glioma cells. The GFP-TRAIL expression after treatment with Ad/gTRAIL was determined by flow cytometric analysis. Cells treated with PBS or Ad/CMV-GFP was used as negative or positive control. On the left side, cell lines; at the top, treatments; and percentages of cells expressing GFP are shown in each panel.
