Annexin V-PE Apoptosis Detection Kit 

MCE Annexin V-PE Apoptosis Detection Kit provides a rapid and convenient method to detect cell apoptosis and necrosis. In normal live cells, Phosphatidylserine (PS) is located on the cytoplasmic surface of the cell membrane. Upon initiation of apoptosis, PS is translocated from the inner to the outer leaflet of the membrane. Annexin V is a 35-36 kDa Ca²⁺ -dependent phospholipid-binding protein that has a high affinity for PS. After staining cells with Annexin V-PE, live cells show little or no fluorescence, apoptosis cells and necrosis cells show red fluorescence.

-20℃, 1 year

Protect from light

Avoid repetitive freeze-thaw cycles

1. Collect 1-5 × 10⁵ cells

For suspension cells: Centrifuge at 1000 g for 5 minutes and then discard the supernatant. Add 1 mL of pre-cooled PBS to resuspend the cells, centrifuge at 1000 g for 5 minutes and then discard the supernatant.

For adherent cells: Collect the cell culture medium. Wash cells with PBS and add trypsin to dissociate cells. Add the medium and gently suspend the cells to make a single-cell suspension. Centrifuge at 1000 g for 5 minutes and then discard the supernatant. Add 1 mL of pre-cooled PBS to resuspend the cells, centrifuge at 1000 g for 5 minutes and then discard the supernatant.

Note: It is recommended to use trypsin containing no EDTA.

2. Resuspend the cells in 195 μL of Binding Buffer.

3. Add 5 μL of Annexin V-PE.

4. Incubate the cells at room temperature for 10-20 minutes in the dark.

5. Detect the fluorescence by flow cytometer or fluorescence microscope (Ex = 488 nm; Em = 578 nm).