Zombie UV™ Fixable Viability Kit

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RUO
Other Names
Fixable Dye, Fixable Viability Dye
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Zombie_UV_Viability_Dye_012714
One day old C57BL/6 mouse splenocytes were stained with Zombie UV™ and analyzed before fixation (purple) or after fixation and permeabilization (red). Cells alone, without Zombie UV™ staining, are indicated in black.
  • Zombie_UV_Viability_Dye_012714
    One day old C57BL/6 mouse splenocytes were stained with Zombie UV™ and analyzed before fixation (purple) or after fixation and permeabilization (red). Cells alone, without Zombie UV™ staining, are indicated in black.
See Zombie UV™ spectral data
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423107 100 tests 72€
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423108 500 tests 268€
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Description

Zombie UV™ is an amine reactive fluorescent dye that is non-permeant to live cells, but permeant to the cells with compromised membranes. Thus, it can be used to assess live vs. dead status of mammalian cells. Zombie UV™ is a polar water soluble dye, providing violet fluorescence, making it suitable for multi-color detection.

Product Details
Technical Data Sheet (pdf)

Product Details

Preparation
Zombie UV™ Fixable Viability kit is composed of lyophilized Zombie UV™ dye and anhydrous DMSO. For reconstitution, bring the kit to room temperature; add 100 µl of DMSO to one vial of Zombie UV™ dye until fully dissolved. 100 tests = 1 vial of Zombie UV™ + DMSO, 500 tests = 5 vials of Zombie UV™ + DMSO.
Storage & Handling
Store kit at -20°C upon receipt. Do not open vials until needed. Once the DMSO is added to the Zombie UV™ dye, use immediately, or store at -20°C in a dry place and protected from light, preferably in a desiccator or in a container with desiccant for no more than one month.
Application

FC - Quality tested

Recommended Usage

Each lot of this product is quality control tested by immunofluorescent staining with flow cytometric analysis.

For flow cytometry, the suggested dilution is 1:100-1:1000 for 1-10 million cells. It is recommended that the reagent be titrated for optimal performance for each application, as optimal dosage varies with cell type.

Excitation Laser
Ultraviolet Laser (355 nm)
Application Notes

Standard Cell Staining Protocol:

  1. Prior to reconstitution, spin down the vial of lyophilized reagent in a microcentrofuge to ensure the reagent is at the bottom of the vial.
  2. For reconstitution, pre-warm the kit to room temperature; add 100 µl of DMSO to one vial of Zombie UV™ dye and mix until fully dissolved
  3. Wash cells with PBS buffer (no Tris buffer and protein free).
  4. Dilute Zombie UV™ dye at 1:100-1000 in PBS. Resuspend 1-10 x 106 cells in diluted 100 µl Zombie UV™ solution. To minimize background staining of live cells, titrate the amount of dye and/or number of cells per 100 µl for optimal performance. Different cell types can have a wide degree of variability in staining based on cell size and degree of cell death.

    Note: Don’t use Tris buffer as a diluent and be sure that the PBS does not contain any other protein like BSA or FBS.
    Note: The amount of dye used can also influence the ability to detect apoptotic as well as live and dead cells.

  5. Incubate the cells at room temperature, in the dark, for 15-30 minutes.
  6. Wash one time with 2 ml BioLegend’s Cell Staining Buffer (Cat. No. 420201) or equivalent buffer containing serum or BSA.
  7. Continue performing antibody staining procedure as desired.
  8. Cells can be fixed with paraformaldehyde or methanol prior to permeabilization or can be analyzed without fixation.

No-wash Sequential Staining Protocol:

  1. Wash cells with PBS buffer (no Tris buffer and protein free).
  2. For reconstitution, pre-warm the kit to room temperature; add 100 µl of DMSO to one vial of Zombie UV™ dye and mix until fully  dissolved
  3. Determine the total µl volume of antibody cocktail previously titrated and optimized for the assay that will be added to each vial/well of cells based on a final volume of 100 µl. Subtract that antibody volume from the 100 µl total staining volume intended for the assay. In the remaining volume, dilute Zombie UV™ dye at 1:100-1000 in PBS as determined by prior optimization at that volume. For example, if you are adding 20 µl of antibody cocktail for a 100 µl total staining volume, use 80 µl of Zombie UV™ solution. Resuspend 1-10 x 106 cells in the appropriate volume of Zombie UV™ solution. Different cell types can have a wide degree of variability in staining based on cell size and degree of cell death.

    Note: Don’t use Tris buffer as a diluent and be sure that the PBS does not contain any other protein like BSA or FBS.
    Note: The amount of dye used can also influence the ability to detect apoptotic as well as live and dead cells.

  4. Incubate for 10-15 minutes at RT, protected from light. Without washing the cells, add the cell surface antibody cocktail and incubate for another 15-20 minutes.
  5. Add 1-2 mL Cell Staining Buffer (Cat. No. 420201) or equivalent buffer containing BSA or serum. Centrifuge to pellet.
  6. Continue with normal fixation and permeabilization procedure. If planning to skip fixation and analyze cells live, complete an additional wash step to minimize any unnecessary background of the live cells.


Notes: If the cell type in use cannot tolerate a protein-free environment, then titrate the Zombie UV™ dye in the presence of the same amount of BSA/serum as will be present in the antibody staining procedure. A higher amount of Zombie UV™ may be required since the BSA/serum will react with and bind up some proportion of the Zombie UV™.

Zombie UV™ dye is excited by the UV laser (350 nm) and has fluorescence emission maximum at 459 nm. If using in a multi-color panel design, filter optimization may be required depending on other fluorophores used. Zombie UV™ dye has similar emission to DAPI.

 

Application References
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Antigen Details

Biology Area
Apoptosis/Tumor Suppressors/Cell Death, Cell Biology, Neuroscience
Gene ID
NA

Related FAQs

I am concerned about the spillover I am observing from the Zombie dye into its neighboring channels.
Rule of thumb with Zombie dyes is to titrate them down as much as possible to fit your application. This should potentially help with spillover. Secondly, Zombie positive events represent dead cells and are typically gated out from analysis.
How does the performance of your Zombie dye compare with competitors?

Zombie dyes have been tested against other leading competitors' fixable viability kits and given comparable results. We also highly recommend that you titrate down the amount of each dye used in order to best match the negative signals of your unstained sample and MFI- (mean fluorescence intensity) stained samples.

Can I use methanol/ethanol for fixation after using a Zombie dye?

Yes, most fixation reagents are fine to be used with Zombie dyes. However, it should be noted that Zombie dyes can still be sensitive to reactive oxygen species. Light exposure or reagents with hydrogen peroxide can lead to free radical formation, affecting fluorescence.

Can Zombie be used to determine bacteria, yeast viability?
We have not tested in house bacterial or yeast viability using Zombie dyes. It is not clear whether the difference between surface and intracellular signals will be significantly different in case of non mammalian cells.
Can I use Zombie with cells suspension containing serum?
Serum is full of proteins which will sequester the dye and thereby reducing its effective concentration. The basic rule of thumb with zombie is to titrate it based on your specific condition. Titration also helps reduce the background and spillover into other channels.
Can I use your Zombie dyes for microscopy application?

Zombie dyes that have been tested for microscopy applications in-house will display data on the product webpage. It should be noted that Zombie may not work for dead cell discrimination in every microscopy application, as a complicated point will be to determine the level of Zombie signal that constitutes a dead cell. Another difficulty may be finding the proper plane for microscopy in order to observe the dead cells.

Why can't I fix my cells prior to using Zombie?

The fixation process can contort and alter the membrane of cells, effectively rendering them as dead. Since the ability of Zombie to stain dead cells is correlated with cell permeability, your results may no longer be a valid representation of dead versus live cells.

Can I use Zombie and Annexin V to detect apoptotic cells?

Yes, Zombie can be used with Annexin V to discriminate live, apoptotic, and dead cells. Cells double positive for both Zombie and Annexin V are dead, while Zombie-dim/Annexin V-positive cells are apoptotic. Live cells will be Zombie-low and Annexin V-negative. The advantage to Zombie over PI and 7-AAD is that you can now fix and/or permeabilize the cells to stain for cell surface and intracellular antigens.

Go To Top Version: 4    Revision Date: 05/30/2019

For research use only. Not for diagnostic use. Not for resale. BioLegend will not be held responsible for patent infringement or other violations that may occur with the use of our products.

 

*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, www.biolegend.com/ordering#license). BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products, reverse engineer functionally similar materials, or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.

 

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