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11884S 25 ml each (2500 assays (96 well format))

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Product Includes Quantity (with Count) Solution Color
Resazurin Solution 25 ml Blue

Product Description

The Resazurin Cell Viability Kit is a fluorescent assay that detects cellular metabolic activity. The blue nonfluorescent resazurin reagent is reduced to highly fluorescent resorufin by dehydrogenase enzymes in metabolically active cells. This conversion only occurs in viable cells and thus, the amount of resorufin produced is proportional to the number of viable cells in the sample. The resorufin formed in the assay can be quantified by measuring the relative fluorescence units (RFU) using a fluorometer (Ex=530-570 nm, Em=590-620 nm).


Specificity / Sensitivity

The Resazurin Cell Viability Kit detects resorufin produced from resazurin conversion by metabolic enzymes in live cells. This kit is expected to work in most cell lines. For most experiments, 0.02-2x105 cells/well should be sufficient, but this can vary depending on the cell type and incubation time. For best results, a cell number titration and incubation time course (as shown in Figure 1) is recommended.

Note: Microbial contaminants will reduce resazurin to resorufin, yielding false positive results. Autofluorescent compounds may interfere with this assay.


Cell viability assays are widely used in drug discovery for the study of growth factors, cytokines, and cytotoxic agents. High throughput screening, in both early drug discovery compound screening and subsequent drug safety and toxicity studies, require reliable, sensitive, and simple assays with the ability to analyze a large number of samples. Colorimetric cell viability assays using tetrazolium salt, such as MTT, XTT, and WST-1, were developed based on live cell reduction of tetrazolium salt into highly colored formazan compounds (1,2). Similarly, resazurin (blue and nonfluorescent) can be reduced to resorufin (pink and highly fluorescent) in live cells and is therefore used to assess mammalian cell toxicity, viability, migration, and invasion (3-6). Similar to the XTT Cell Viability Kit #9095, the Resazurin Cell Viability Kit does not require radioactive materials, cell fixation, or cell permeabilization, and cells used in this assay may be used for further analysis.


1.  Scudiero, D.A. et al. (1988) Cancer Res 48, 4827-33.

2.  Roehm, N.W. et al. (1991) J Immunol Methods 142, 257-65.

3.  Nakayama, G.R. et al. (1997) J Immunol Methods 204, 205-8.

4.  Al-Nasiry, S. et al. (2007) Hum Reprod 22, 1304-9.

5.  Anoopkumar-Dukie, S. et al. (2005) Br J Radiol 78, 945-7.

6.  O'Brien, J. et al. (2000) Eur J Biochem 267, 5421-6.



For Research Use Only. Not For Use In Diagnostic Procedures.
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