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In vitro apoptosis study. (A) The cells were incubated with free PTX, FA-7PTX, 7PTX-EB, or FA-7PTX-EB. One day later, morphology of cell apoptosis was observed by confocal microscopy. Blue: DAPI fluorescence (nucleus stain); Green: Annexin V-FITC (apoptotic cell membrane); and red: Propidium Iodide, PI (apoptotic cell nucleus). (B) The apoptosis cycle percent (%): Q2 + Q4.
