The Resazurin Cell Viability Assay is a fluorescent assay that detects the cellular metabolic activities. The kit offers a simple, rapid, reliable, sensitive, safe and cost-effective measurement of cell viability. Resazurin is a blue non-fluorescent dye until it is irreversibly reduced to the pink colored, highly red fluorescent resorufin by dehydrogenase enzymes in metabolically active cells. The fluorescent signal is monitored using 530 – 560 nm excitation wavelength and 590 nm emission wavelength. The absorbance is monitored at 570 nm and 600 nm. The fluorescent or colorimetric signal generated is proportional to the number of living cells in the sample.