Annexin V-mFluor Violet 450 Apoptosis Detection Kit (ab219920)
Key features and details
- Assay type: Quantitative
- Detection method: Fluorescent
- Platform: Flow cytometer
- Sample type: Adherent cells, Suspension cells
Overview
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Product name
Annexin V-mFluor Violet 450 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: Mammals, Other species -
Product overview
Annexin V-mFluor Violet 450 Apoptosis Detection Kit (ab219920) contains Annexin V labeled with our proprietary blue fluorescent dye mFluor Violet 450, which allows the identification and quantitation of apoptotic cells on a single-cell basis by flow cytometry. Simultaneous staining of cells with Annexin V-mFluor Violet 450 (blue fluorescence) and the non-vital dye propidium iodide (PI) (orange fluorescence) allows the discrimination of intact cells (Annexin V-mFluor Violet 450 negative, PI Staining Solution negative), early apoptotic (Annexin V-mFluor Violet 450 positive, PI Staining Solution negative) and late apoptotic or necrotic cells (Annexin V-mFluor Violet 450, PI Staining Solution positive).
The mFluor Violet 450 (Ex/Em = 405/450 nm, excited with the violet laser at 405 nm) has spectral properties almost identical to those of Pacific Blue®, making it convenient to be used with a fluorescence instruments equipped with a violet laser.
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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.
Pacific Blue® is the trademark of Invitrogen.
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Platform
Flow cytometer
Properties
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Storage instructions
Store at -20°C. Please refer to protocols. -
Components 100 tests 100X Propidium Iodide 1 x 100µl Anexin Violet 450 (100X stock solution) 1 x 200µl Assay Buffer 1 x 50ml -
Research areas
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Function
This protein is an anticoagulant protein that acts as an indirect inhibitor of the thromboplastin-specific complex, which is involved in the blood coagulation cascade. -
Involvement in disease
Pregnancy loss, recurrent, 3 -
Sequence similarities
Belongs to the annexin family.
Contains 4 annexin repeats. -
Domain
The [IL]-x-C-x-x-[DE] motif is a proposed target motif for cysteine S-nitrosylation mediated by the iNOS-S100A8/A9 transnitrosylase complex.
A pair of annexin repeats may form one binding site for calcium and phospholipid. -
Post-translational
modificationsS-nitrosylation is induced by interferon-gamma and oxidatively-modified low-densitity lipoprotein (LDL(ox)) possibly implicating the iNOS-S100A8/9 transnitrosylase complex. - Information by UniProt
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Alternative names
- Anchorin CII
- Annexin 5
- Annexin A5
see all
Images
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The detection of binding activity of Annexin V-mFluor Violet 450 and phosphatidylserine in Jurkat cells.
Annexin V-mFluor Violet 450 Apoptosis Detection Kit (ab219920). Detection of phosphatidylserine (PS) exposure in Jurkat cells. Jurkat cells were left untreated (blue) or treated with 20 μM camptothecin (red) in a 37°C, 5% CO2 incubator for 4-5 hours. Cells were then incubated with Annexin V-mFluor Violet reagent and PI for 30 minutes. The fluorescence intensitiy of Annexin V-mFluor Violet 450 was measured with a FACSCalibur (BD Systems) flow cytometer using the Violet channel.
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 Violet 450 conjugate binds to phosphatidylserine, which is located on the outer leaflet of the cell membrane, resulted in increased staining intensity.
