Cell proliferation is an important indicator to understand the mechanisms of certain genes, proteins and pathways involved in cell survival or death after exposing to toxic substances. Generally, the cell proliferation assays are used for drug screening t... большеCell proliferation is an important indicator to understand the mechanisms of certain genes, proteins and pathways involved in cell survival or death after exposing to toxic substances. Generally, the cell proliferation assays are used for drug screening to detect whether the test molecules have effects on cell proliferation or display direct cytotoxic effects. Measuring the synthesis of new DNA is the most precise method to assay cell proliferation.