Overview

  • Product name

    Annexin V-iFluor 594 Apoptosis Detection Kit
    See all Annexin V/ANXA5 kits
  • Detection method

    Fluorescent
  • Sample type

    Adherent cells, Suspension cells
  • Assay type

    Quantitative
  • Species reactivity

    Reacts with: Other species, Mammals
  • Product overview

    Annexin V-iFluor 594 Apoptosis Detection Kit (ab219918) contains Annexin V labeled with our proprietary red fluorescent dye iFluor 594, which allows the identification and quantification of apoptotic cells on a single-cell basis by flow cytometry or fluorescence microscopy.


    The iFluor 594 dye (Ex/Em = 590/620 nm) has spectral properties almost identical to those of Texas Red® or Alexa Fluor® 594, making it convenient to be used for common fluorescence instruments equipped with the light sources and filters for Texas Red®.

  • 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, Fluorescence microscope

Properties

Images

  • Annexin V-iFluor 594 Apoptosis Detection Kit (ab219918). Detection of phosphatidylserine (PS) exposure in Jurkat cells. Jurkat cells were grown in a Costar black wall/clear bottom 96-well plate and either left untreated (A) or treated with 1 μM staurosporine (B) in a 37°C, 5% CO2 incubator for 5 hours. Cells were then incubated with Annexin V-iFluor 594 Reagent for 30 minutes.

    In live non-apoptotic cells, Annexin V-iFluor 594 conjugate detects innate apoptosis in non-induced cells, which is typically 2-6% of all cells. In apoptotic cells Annexin V-iFluor 594 conjugate binds to phosphatidylserine, which is located on the outer leaflet of the cell membrane, resulted in increased staining intensity.

Protocols

References

ab219918 has not yet been referenced specifically in any publications.

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