Product introduction：

The CCK - 8 assay kit is a rapid and highly sensitive detection kit widely used for cell proliferation and cytotoxicity assays, based on WST - 8. It is a perfect replacement and upgrade for the traditional MTT assay method.

In the presence of an electron - coupling reagent (1 - Methoxy PMS), WST - 8 can be reduced by dehydrogenases in the mitochondria to generate an orange - yellow formazan product. The amount of formazan produced is directly proportional to the number of viable cells. 

Therefore, based on this characteristic, the CCK - 8 assay can be directly used for cell proliferation determination, cytotoxicity analysis, drug screening, and tumor drug sensitivity testing.