Annexin V-mFluor Violet 554 Apoptosis Staining / Detection Reagent (ab219911)


  • Product name

    Annexin V-mFluor Violet 554 Apoptosis Staining / Detection Reagent
    See all Annexin V/ANXA5 kits
  • Detection method

  • Sample type

    Adherent cells, Suspension cells
  • Assay type

  • Species reactivity

    Reacts with: Other species, Mammals
  • Product overview

    Annexin V-mFluor Violet 450 Apoptosis Staining / Detection Reagent (ab219911) is a cell- impermeable reagent designed to bind to phosphatidylserine (PS) residues exposed on the outer cell surface of cells with a flow cytometer or fluorescence microscopy at Ex/Em = 403/554 nm, excited with the violet laser at 405 nm.

    We recommend using an impermeable nuclear stain such as Propidium Iodide (ab14083) or DRAQ7™ (ab109202) together with Annexin V-mFluor Violet 450 Detection Reagent to discriminate necrotic and dead cells: plasma membrane is disrupted in these cells and therefore the Annexin V reagent will bind to PS found in the interior of cells.

  • Notes

    Apoptosis is a regulated process of cell death that occurs during embryonic development as well as maintenance of tissue homeostasis. Inappropriately regulated apoptosis is implicated in different disease states, such as neurodegeneration disease and cancer. The apoptosis program is characterized by morphologic features, including loss of plasma membrane asymmetry and attachment, condensation off the cytoplasm and nucleus, and compaction and fragmentation of the nuclear chromatin. Exposure of phosphatidylserine (PS) on the external surface of the cell membrane has been reported to occur in the early phases of apoptotic cell death, during which the cell membrane remains intact. In leukocyte apoptosis, PS on the outer surface of the cell marks the cell for recognition and phagocytosis by macrophages. The human vascular anticoagulant, annexin V, is a 35-36 kDa Ca2+ dependent phospholipid binding protein that has a high affinity for PS, and shows minimal binding to phosphatidylcholine and sphingomyelin. Changes in PS asymmetry, which can be analyzed by measuring annexin V binding to the cell membrane, are generally observed before morphological changes associated with apoptosis occurred and before membrane integrity is lost.

  • Platform

    Flow cytometer



  • Annexin V-mFluor Violet 450 Detection Reagent (ab219911) Detection of phosphatidylserine (PS) exposure in Jurkat cells. Jurkat cells were left untreated (blue) or treated with 1 μM staurosporine (red) in a 37°C, 5% CO2 incubator for 5 hours. Cells were then incubated with Annexin V Detection Reagent for 30 minutes. The fluorescence intensity of Annexin V-mFluor 450 Detection Reagent was measured with a FACSCalibur (BD systems)flow cytometer using violet laser at Ex/Em = 405/450 nm.

    In live non-apoptotic cells, Annexin V-mFluor Violet 450 conjugate detects innate apoptosis in non-induced cells, which is typically 2-6% of all cells. In apoptotic cells Annexin V-mFluor Violet450 conjugate binds to phosphatidylserine, which is located on the outer leaflet of the cell membrane, resulted in increased staining intensity.



ab219911 has not yet been referenced specifically in any publications.

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