CellTiter-Fluor™ Cell Viability Assay
A Non-Lytic Fluorescence Assay That Measures the Relative Number of Viable Cells in Culture
- Multiplex with many other luminescent assays
- Normalizing data for live-cell numbers make results more comparable to other data
Catalog Number:
Size
Catalog Number: G6080
Catalog Number: G6081
Catalog Number: G6082
How the Assay Works
The CellTiter-Fluor™ Cell Viability Assay is a non-lytic, single-reagent-addition fluorescence assay that measures the relative number of viable cells in a population. The assay is based on measurement of a conserved and constitutive protease activity within live cells and therefore serves as a biomarker of cell viability. The live-cell protease activity is restricted to intact viable cells and is measured using a fluorogenic, cell-permeant, peptide substrate (Gly-Phe-AFC). The substrate enters intact cells, where it is cleaved by the live-cell protease activity to generate a fluorescent signal proportional to the number of living cells. The live-cell protease becomes inactive upon loss of membrane integrity and leakage into the surrounding culture medium.
Multiplexing with the CellTiter-Fluor™ Assay
The CellTiter-Fluor™ Assay also can be used in a single-well, sequential, multiplex format with other downstream assay chemistries to normalize data by cell number. Data from the assay can serve as an internal control and allow identification of errors resulting from cell clumping or compound cytotoxicity. In the example data on the right, ionomycin and PMA work cooperatively to stimulate NFAT-dependent gene expression; however, a higher concentration of ionomycin results in decreased expression. By simultaneously monitoring viability with the CellTiter-Fluor™ Assay, it is shown that the decrease in expression is due to a decrease in viable cells.
Luciferase reporter expression (ONE-Glo™ Assay) and cell viability (CellTiter-Fluor™ Assay) at increasing ionomycin concentration.
The CellTiter-Fluor™ Reagent was added to wells and viability measured after incubation for 30 minutes at 37°C. Caspase-Glo® 3/7 Reagent was added and luminescence measured after a 30-minute incubation (10,000 cells/well).
Protocols
Specifications
Catalog Number:
What's in the box?
| Item | Part # | Size |
|---|---|---|
|
GF-AFC Substrate |
G608A | 1 × 10μl |
|
Assay Buffer |
G610A | 1 × 10ml |
SDS
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Use Restrictions
For Research Use Only. Not for Use in Diagnostic Procedures.Storage Conditions
What's in the box?
| Item | Part # | Size |
|---|---|---|
|
GF-AFC Substrate |
G608A | 5 × 10μl |
|
Assay Buffer |
G610A | 5 × 10ml |
SDS
Search for SDSCertificate of Analysis
Use Restrictions
For Research Use Only. Not for Use in Diagnostic Procedures.Storage Conditions
What's in the box?
| Item | Part # | Size |
|---|---|---|
|
GF-AFC Substrate |
G608B | 2 × 50μl |
|
Assay Buffer |
G610B | 2 × 50ml |
SDS
Search for SDSCertificate of Analysis
Use Restrictions
For Research Use Only. Not for Use in Diagnostic Procedures.Storage Conditions
Resources
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