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PDT induces significant apoptosis of A549 cells. Flow cytometry results of apoptotic assays after photoirradiation with or without Ad5/F35-APE1 siRNA recombinant adenovirus, untreated group as negative control. The x axis is for FITC staining and the y axis is for PE staining in all graphs represented. The cells undergoing early apoptosis are FITC positive and PE-A negative in the lower right quadrants.
