A colorimetric, non-radioactive assay for assessing cell viability and proliferation. Tetrazolium salt, XTT, is reduced to a soluble purple formazan by trans-plasma membrane electron transport from NADH via an electron mediator.

• Detect 500 to 100000 cells per well
• Allows investigators to screen drug candidates involved in cell cycle regulation

Cell proliferation assays are widely used to assess cell cycle regulatory factors such as growth factors, cytokines, mitogens, and drugs.