XTT Assay Kits

XTT assays use the tetrazolium salt XTT (2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide) to measure the metabolic activity of cells. It is a colorimetric assay that reduces a yellow tetrazolium salt to an orange formazan dye in the presence of metabolically active cellular dehydrogenases. The intensity of the resulting color is proportional to the number of viable cells in the sample. XTT assays can be used to study cell proliferation in response to growth factors, nutrients, and stimuli for the assessment of growth inhibitors and to measure cytotoxicity. Browse the XTT assay kits below and visit the supplier for more details, including kit components and protocols.