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APT420 CaspaTag™ Pan-Caspase In Situ Assay Kit, Fluorescein

25 assays  
Purchase on Sigma-Aldrich


Replacement Information

Key Spec Table

Species ReactivityKey ApplicationsDetection Methods
MaFC, ACTFluorescent
Catalogue NumberAPT420
Brand Family Chemicon®
Trade Name
  • CaspaTag
  • Chemicon
DescriptionCaspaTag™ Pan-Caspase In Situ Assay Kit, Fluorescein
Materials Required but Not Delivered· Cultured cells with media

· Reagents to induce apoptosis

· 15 mL polystyrene centrifuge tubes

· Amber vials or tubes for storage of 150X concentrate at -20°C

· 600 mL graduated cylinder

· Microscope slides

· Hemocytometer

· Centrifuge (400 x g)

· 37°C incubator

· Vortexer

· Adjustable volume pipettor with disposable tips

· Deionized water

· PBS, pH 7.4

Background InformationApoptosis is an evolutionarily conserved form of cell suicide, which follows a specialized cellular process. The central component of this process is a cascade of proteolytic enzymes called caspases. These enzymes participate in a series of reactions that are triggered in response to pro-apoptotic signals and result in the cleavage of protein substrates, causing the disassembly of the cell1.

Caspases have been identified in organisms ranging from C. elegans to humans. The mammalian caspases play distinct roles in apoptosis and inflammation. In apoptosis, caspases are responsible for proteolytic cleavages that lead to cell disassembly (effector caspases), and are involved in upstream regulatory events (initiator caspases). An active caspase consists of two large and two small subunits that form two heterodimers, which associate in a tetramer2-4. In common with other proteases, caspases are synthesized as precursors that undergo proteolytic maturation, either autocatalytically or in a cascade by enzymes with similar specificity5.

Caspase enzymes specifically recognize a 4 or 5 amino acid sequence on the target substrate, which necessarily includes an aspartic acid residue. This residue is the target for cleavage, which occurs at the carbonyl end of the aspartic acid residue6. Caspases can be detected via immunoprecipitation, immunoblotting techniques using caspase specific antibodies, or by employing fluorochrome substrates, which become fluorescent upon cleavage by the caspase.
Product Information
  • FLICA Reagent (FAM-VAD-FMK): One lyophilized vial
  • 10X Wash Buffer: 15 mL
  • Fixative: 6 mL
  • Propidium Iodide: 1 mL at 250 μg/mL, ready-to-use
  • Hoechst Stain: 1 mL at 200 μg/mL, ready-to-use
Detection methodFluorescent
Quality LevelMQ100
ApplicationThe CaspaTag Pan-Caspase In Situ Assay Kit, Fluorescein for flow cytometry is a fluorescent-based assay for detection of active caspases in cells undergoing apoptosis.
Key Applications
  • Flow Cytometry
  • Activity Assay
Application NotesThe CHEMICON® CaspaTag™ Pan-Caspase In Situ Assay Kit, Fluorescein is a fluorescent-based assay for detection of active caspases in cells undergoing apoptosis. The kit is for research use only. Not for use in diagnostic or therapeutic procedures.

Test Principle

CHEMICON®'s CaspaTag™ In Situ Caspase Detection Kits use a novel approach to detect active caspases. The methodology is based on Fluorochrome Inhibitors of Caspases (FLICA). The inhibitors are cell permeable and non-cytotoxic. Once inside the cell, the inhibitor binds covalently to the active caspase7. This kit uses a carboxyfluorescein-labeled fluoromethyl ketone peptide inhibitor of caspase (FAM-VAD-FMK), which produces a green fluorescence. When added to a population of cells, the FAM-VAD-FMK probe enters each cell and covalently binds to a reactive cysteine residue that resides on the large subunit of the active caspase heterodimer, thereby inhibiting further enzymatic activity. The bound labeled reagent is retained within the cell, while any unbound reagent will diffuse out of the cell and is washed away. The green fluorescent signal is a direct measure of the amount of active caspase present in the cell at the time the reagent was added. Cells that contain the bound labeled reagent can be analyzed by 96-well plate-based fluorometry, fluorescence microscopy, or flow cytometry.
Biological Information
Species Reactivity
  • Mammals
Physicochemical Information
Materials Information
Toxicological Information
Safety Information according to GHS
Safety Information
Product Usage Statements
Usage Statement
  • Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
Storage and Shipping Information
Storage Conditions· Store unopened kit materials at 2-8°C up to their expiration date.

· Reconstituted FLICA Reagent (150X) should be frozen at -20°C for up to 6 months, and may be thawed twice during this time. Aliquot into separate amber tubes if desired. Protect from light at all times.

· Store diluted (1X) wash buffer up to -2-8°C for 2 weeks.
Packaging Information
Material Size25 assays
Transport Information
Supplemental Information
Global Trade Item Number
Catalogue Number GTIN
APT420 04053252269370


CaspaTag™ Pan-Caspase In Situ Assay Kit, Fluorescein SDS


Safety Data Sheet (SDS) 


Reference overviewPub Med ID
Analysis of DNA breaks, DNA damage response, and apoptosis produced by high NaCl.
Natalia I Dmitrieva, Maurice B Burg
American journal of physiology. Renal physiology  295  F1678-88  2008

Show Abstract Full Text Article
18829739 18829739


Advancing cancer research: From hallmarks & biomarkers to tumor microenvironment progression

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