Aposcreen Annexin V Apoptosis Kit : PE (OKSB00008)

The ApoScreen Annexin V Apoptosis Kit employs a fluorescein- labeled annexin V (annexin V- FITC) in concert withpropidium iodide (PI) to evaluate subpopulations of cells undergoing apoptosis. During the early stages of apoptosis, cells begin to display PS on the outer cell membrane where it is readily detectable by staining the cells with annexin VFITC.As the plasma membrane becomes increasingly permeable during the later stages of apoptosis, PI can readilymove across the cell membrane and bind to cellular DNA, providing a means for identifying those cells that have lostmembrane integrity through mechanisms including necrosis. When cells are double stained with annexin V- FITC and PI, three different cell populations may be observed (Figure 2): (i) live cells that do not stain with either annexin V- FITC or PI; (ii) necrotic cells that stain with both reagents; and (iii) apoptotic cells that stain with annexin V- FITC only. Analysis canbe performed on any flow cytometer equipped with a single laser using excitation at 488 nm. Alternatively, the cells canbe examined with a fluorescence microscope equipped with filters for discrimination of FITC and rhodamine/PI.

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