Annexin V conjugates

Annexin V conjugates

This product is suitable for the identification and enumeration of dead cells, such as apoptotic or necrotic cells, by flow cytometry.

Background information

The Annexin V conjugates selectively label apoptotic, necrotic, and dead cells through the specific binding of Annexin V to phosphotidylserine (PS). In most normal, viable eukaryotic cells, the negatively charged phospholipid PS is located in the cytosolic leaflet of the plasma membrane lipid bilayer.
1
PS redistribution from the inner to the outer leaflet is an early and widespread event during apoptosis.
1,2
However, in necrosis, PS becomes accessible due to the disruption of membrane integrity.
2
Apart from necrosis and apoptosis, PS also becomes accessible in activated platelets
3
, in certain cell anomalies like sickle cell anemia
4
, in erythrocyte senescence
5
, upon degranulation of mast cells
6
, and in certain stages of B cell differentiation
7
. PS exposure by apoptotic cells serves as a trigger for the recognition and removal by macrophages.
8,9
Annexin V is a 35 kDa phospholipid-binding protein and has a high affinity for PS in the presence of physiological concentrations of calcium (Ca
2+
).
10
  • Selected references

    1. Krampera, M. et al. (2018) Characterization of a new B-ALL cell line with constitutional defect of the Notch signaling pathway. Oncotarget 9(26): 18956
    2. Koopman, G. et al. (1994) Annexin V for flow cytometric detection of phosphatidylserine expression on B cells undergoing apoptosis. Blood 84: 1415-1420
    3. Martin, S. J. et al. (1995) Early redistribution of plasma membrane phosphatidylserine is a general feature of apoptosis regardless of the initiating stimulus: inhibition by overexpression of Bcl-2 and Abl. J. Exp. Med. 182: 1545-1556
    4. Thiagarajan, P. et al. (1990) Binding of annexin V/placental anticoagulant protein I to platelets. Evidence for phosphatidylserine exposure in the procoagulant response of activated platelets. J. Biol. Chem. 265: 17420-17423
    5. Kuypers, F. A. et al. (1996) Detection of altered membrane phospholipid asymmetry in subpopulations of human red blood cells using fluorescently labeled annexin V. Blood 87: 1179-1187
    6. Schroit, A. J. et al. (1991) Transbilayer movement of phospholipids in red cell and platelet membranes. Biochim. Biophys. Acta 1071: 313-329
    7. Demo et al. (1999) Quantitative measurement of mast cell degranulation using a novel flow cytometric annexin-V binding assay. Cytometry 36: 340-348
    8. Dillon, S. R. et al. (2001) Annexin V binds to positively selected B cells. J. Immunol. 166: 58-71
    9. Fadok, V. A. et al. (1992) Exposure of phosphatidylserine on the surface of apoptotic lymphocytes triggers specific recognition and removal by macrophages. J. Immunol. 148: 2207-2216
    10. Fadok, V. A. et al. (2000) A receptor for phosphatidylserine-specific clearance of apoptotic cells. Nature 405: 85-90
    11. Moss, S. E. et al. (1991) Diversity in the Annexin family. In: Novel Calcium Binding Proteins, Springer Verlag : 535-566
Product options: 5
130-097-928

Annexin V-FITC

for 30
tests
(1)
USD 52.00
130-093-060

Annexin V-FITC

for 100
tests
(1)
USD 240.00
130-108-112

Annexin V-PE

for 30
tests
(1)
USD 67.00
130-097-925

Annexin V-Biotin

for 30
tests
(1)
USD 47.00
130-092-773

Annexin V-Biotin

for 100
tests
(1)
USD 240.00

Related products

3 products available