Annexin V-mCherry Apoptosis Assay (TBS2112)

Annexin V belongs to the annexin family of intracellular proteins that bind to phosphatidylserine (PS) in a calcium dependent manner. PS is located on the inner layer of the phospholipid bilayer of the plasma membrane in viable cells. Cells undergoing early apoptosis will transfer PS to the external layer while maintaining an intact plasma membrane. Fluorescently labeled Annexin V may be used to bind the PS specifically and identify cells engaged in the early stages of apoptosis. During late apoptosis or necrosis, plasma membrane integrity is lost, which allows for the access of live/dead cell differential dyes such as 7-ADD, Propidium Iodide, or DRAQ7. The staining of cells with Annexin V will effectively resolve viable apoptotic cell populations by flow cytometry.

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