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FAM-VAD-FMK
FAM-VAD is a green fluorescent cell-permeable polycaspase inhibitor to target caspases 1, 2, 3, 6, 8, 9, or 10. Once inside the cell, the inhibitor binds covalently to the active caspase, 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. It works in diverse cell lines such as human, rodent and drosophila.
Chemical structure for FAM-VAD-FMK
Chemical structure for FAM-VAD-FMK
CatalogSize
Price
Quantity
1347025 Tests
Price
13484100 Tests
Price
 
Physical properties

Molecular weight691.66
SolventDMSO
Spectral properties

Correction factor (260 nm)0.32
Correction factor (280 nm)0.178
Extinction coefficient (cm -1 M -1)
83000
Excitation (nm)493
Emission (nm)517
Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12352200
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Page updated on October 13, 2025