Protein synthesis rate is demonstrated to be proportional to cell proliferation and is a very sensitive cytotoxicology marker. The CytoX-Red™ Cell Proliferation/Cytotoxicity Assay Kit provides a simple and convenient method for measuring cell viability, proliferation, and cytotoxicity in adherent or monolayer cells through quantifying total protein contents. The CytoX-Red™ is proven to be accurate and yields reproducible results. A complete proliferation/cytotoxicity assay can be finished within 20 minutes. Thus, the CytoX-Red™ provides a considerably faster procedure than any competitor kits.