Shop All Cell Viability Kits

Tali™ Viability Kit - Dead Cell Red (Invitrogen™)

The Tali® Viability Kit - Dead Cell Red is a ready-to-use solution of propidium iodide (PI) that has been validated for use with the Tali® Image-Based Cytometer. PI is a live cell-impermeant fluorogenic DNA-binding dye that has been extensively used to identify necrotic cells.

Key Features of Tali® Viability Kit - Dead Cell Red:

• Impermeant to live cells
• Easily enters and binds to nucleic acids in necrotic cells

After staining a cell population using Dead Cell Red™, dead cells display red fluorescence upon excitation. Tali® Viability Kit - Dead Cell Red can be used to identify dead cells in a population of unstained cells, or in a population of GFP-expressing cells.

HCS LIVE/DEAD™ Green Kit (Invitrogen™)

The HCS LIVE⁄DEAD® Green Kit measures cytotoxicity by high content analysis with the Image-iT® DEAD Green™ viability stain – a non-fluorescent and cell impermeant compound that exhibits a strong fluorescent enhancement upon binding to DNA. Drugs and test compounds leading to serious cell injuries, including plasma membrane permeability, allow entry of the Image-iT® DEAD Green™ viability stain. This two-color fluorescence assay also employs the use of a cell permeant nuclear segmentation tool that stains both live and dead cells, reflecting the total cell number within the sample. For total cell staining, the kit includes both a blue-fluorescent Hoechst 33342 and a near infrared-fluorescent, HCS NuclearMask™ Deep Red reagent. Either of these segmentation tools may be used with Image-iT® DEAD Green™ viability stain for excellent discrimination of live and dead cells that survives fixation and permeabilization for combination with additional parameters of cytotoxicity or other biomarkers. The kit contains sufficient reagents for performing 2, 96-well plates.

CellROX™ Deep Red Flow Cytometry Assay Kit (Invitrogen™)

The CellROX™ Deep Red Flow Cytometry Assay Kit enables the flow cytometric detection of reactive oxygen species (ROS) in live cells. The kit includes the novel, fluorogenic CellROX™ Deep Red Reagent, as well as SYTOX™ Blue dead cell stain, N-acetyl cysteine (an antioxidant, for negative control), and tert-butyl hydroperoxide solution (TBHP, an inducer of ROS).

View a selection guide for all CellROX® Reagents and Kits.

The CellROX™ Deep Red Flow Cytometry Assay Kit features:

• Fluorogenic probe formulated for flow cytometry that is oxidized in the presence of ROS
• Multicolor compatibility—minimal overlap with fluorophores excited by other laser lines, allowing easy multiplexing with other reagents
• Simple protocol—cells can be stained in complete media or other appropriate buffer, no need for serum free media

The CellROX™ Deep Red Detection Reagent is cell-permeable and non-fluorescent or very weakly fluorescent while in the reduced state. Upon oxidation, the reagent exhibits a strong fluorogenic signal that has absorption/emission maxima of 644/665 nm and remains localized in the cytoplasm. When used together with the included SYTOX™ Blue Dead Cell Stain, oxidatively stressed and non-stressed cells are reliably distinguished from dead cells by flow cytometry.

LIVE/DEAD™ Fixable Red Dead Cell Stain Kit, for 488 nm excitation (Invitrogen™)

The LIVE/DEAD™ Fixable Red Dead Cell Stain Kit is used to determine the viability of cells prior to the fixation and permeabilization required for intracellular antibody staining or prior to elimination of biohazardous materials using formaldehyde fixation. This kit has been optimized and validated for use with a blue laser flow cytometer.

• Stable—dyes are freeze dried in separate vials to maintain stability
• Robust—staining pattern is the same before and after fixation
• Bright signal—allows for easy distinction between live/dead cells in single channel

View a selection guide for all fixable viability dyes for flow cytometry.

Stable
Unlike products that are sold in solution, the LIVE/DEAD™ Fixable Red Stain has been conveniently packaged in 40-test vials to help ensure the stability and performance of the dye over time. Amine reactive dyes in solution will lose their effectiveness over a short period of time, therefore it is recommended to completely use the vial once rehydrated. If this is not possible, aliquot the vials in small volumes and store at -80°C, avoiding freeze-thaw cycles.

Robust
Dead cell discriminator stains can lose sensitivity after treatment with fixatives such as formaldehyde or ethanol-based fixation methods required for intracellular phosphorylation studies. The LIVE/DEAD™ Fixable Red Stain is an amine reactive dye that binds covalently to intracellular and extracellular amines, and the staining pattern is preserved following formaldehyde fixation.

Optimal brightness
The LIVE/DEAD™ Fixable Red stain was selected based on its fluorescent properties to provide a bright signal when excited with a yellow, green, or blue 488 nm laser. The red-fluorescent reactive dye has an excitation maximum of ~595 nm, making it ideal for use with the yellow laser, and an emission of ~615 nm, allowing collection in the 610 or 630 BP filter. LIVE/DEAD™ Fixable Red Dead Cell stain is also excited well with the blue 488 nm laser. Since live and dead cells can be discriminated using a single dye and a single channel of a flow cytometer, it is an ideal choice for multi-color experiments.

How it works
In cells with compromised membranes, the dye reacts with free amines both in the cell interior and on the cell surface, yielding intense fluorescent staining. In viable cells, the dye's reactivity is restricted to the cell-surface amines, resulting in less intense fluorescence. The difference in intensity is typically greater than 50-fold between live and dead cells, allowing for easy discrimination.

Colors available
LIVE/DEAD™ Fixable Dead Cell Stains are available in a wide variety of colors to meet your multi-color panel needs.

LIVE/DEAD™ Fixable Near-IR Dead Cell Stain Kit, for 633 or 635 nm excitation (Invitrogen™)

The LIVE/DEAD™ Fixable Near-IR Dead Cell Stain Kit is used to determine the viability of cells prior to the fixation and permeabilization required for intracellular antibody staining or prior to elimination of biohazardous materials using formaldehyde fixation. This kit has been optimized and validated for use with a red laser flow cytometer.

• Stable—dyes are freeze dried in separate vials to maintain stability
• Robust—staining pattern is the same before and after fixation
• Bright signal—allows for easy distinction between live/dead cells in single channel

View a selection guide for all fixable viability dyes for flow cytometry.

Stable
Unlike products that are sold in solution, the LIVE/DEAD™ Fixable Near-IR Stain has been conveniently packaged in 40-test vials to help ensure the stability and performance of the dye over time. Amine reactive dyes in solution will lose their effectiveness over a short period of time, therefore it is recommended to completely use the vial once rehydrated. If this is not possible, aliquot the vials in small volumes and store at -80°C, avoiding freeze-thaw cycles.

Robust
Dead cell discriminator stains can lose sensitivity after treatment with fixatives such as formaldehyde or ethanol-based fixation methods required for intracellular phosphorylation studies. The LIVE/DEAD™ Fixable Near-IR Stain is an amine reactive dye that binds covalently to intracellular and extracellular amines, and the staining pattern is preserved following formaldehyde fixation.

Optimal brightness
The LIVE/DEAD™ Fixable Near-IR stain was selected based on its fluorescent properties to provide a bright signal when excited with a red laser. The near-IR fluorescent reactive dye has an excitation maximum of ~633 nm making it ideal for use with the red or HeNe laser with an emission of ~750 nm. Since live and dead cells can be discriminated using a single dye and a single channel of a flow cytometer, it is an ideal choice for multi-color experiments.

How it works
In cells with compromised membranes, the dye reacts with free amines both in the cell interior and on the cell surface, yielding intense fluorescent staining. In viable cells, the dye's reactivity is restricted to the cell-surface amines, resulting in less intense fluorescence. The difference in intensity is typically greater than 50-fold between live and dead cells, allowing for easy discrimination.

Colors available
LIVE/DEAD™ Fixable Dead Cell Stains are available in a wide variety of colors to meet your multi-color panel needs.

LIVE/DEAD™ Yeast Viability Kit (Invitrogen™)

The LIVE/DEAD® Yeast Viability Kit combines a novel two-color fluorescent probe for yeast viability, FUN® 1, with a fluorescent fungal surface labeling reagent Calcofluor® White M2R. Plasma membrane integrity and metabolic function of fungi are required to convert the yellow-green-fluorescent intracellular staining of FUN® 1 into red-orange intravacuolar structures; Calcofluor White M2R labels cell-wall chitin with blue-fluorescence regardless of metabolic state.

LIVE/DEAD™ BacLight™ Bacterial Viability and Counting Kit, for flow cytometry (Invitrogen™)

The LIVE/DEAD™ BacLight™ Bacterial Viability and Counting Kit allows researchers to reliably distinguish and quantitate live and dead bacteria with the aid of a flow cytometer, even in a mixed population containing a range of bacterial types. This kit uses a mixture of two nucleic acid stains - green-fluorescent SYTO™ 9 dye and red-fluorescent propidium iodide - for viability determinations, and a calibrated suspension of microspheres for accurate sample volume measurements.

View additional information about all microbiology assays for flow cytometry.