Cell Proliferation · Cytotoxicity Assay Kits Selection Guide

Cell proliferation and cytotoxicity assays are used for drug screening and cytotoxicity tests for chemicals. They are based on various cell functions such as enzyme activity, cell membrane permeability, cell adherence, ATP production, co-enzyme production, and nucleotide uptake activity. Enzyme-based methods using MTT and WST rely on a reductive coloring reagent and dehydrogenase in a viable cell to determine cell viability with a colorimetric method. These methods are easy-to-use, safe, has higher reproducibility, and is widely used in both cell viability and cytotoxicity tests.


Cell Proliferation and Cytotoxicity Product Selection Guide

Product Name Cell Counting Kit-8
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Cell Counting Kit-F
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Cytotoxicity LDH Assay Kit-WST
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  • Cell Proliferation
  • Cytotoxicity
  • Cell Proliferation
  • Cytotoxicity
  • Cell Proliferation
  • Cytotoxicity
  • Cytotoxicity
  • Cell Damage
Dye Features Measurement Colorimetric Fluorometric Colorimetric Colorimetric
Dye WST-8 Calcein-AM MTT WST
Water Solubility Soluble - Non Soluble Soluble
Product Features Assay Mechanism Cellular Dehydrogenase Activity Intracellular Esterase Activity Mitochondrial Dehydrogenase Activity Released LDH Activity
  • Low Cytotoxicity
  • No need to dissolve
  • High Product Stability
  • High Sensitivity
  • One-bottle - pre-mixed solution
  • Widely used and accepted method
  • Higher Sensitivity than Colorimetric method
  • Shorter Measurement time than Colorimetric method
  • Low Cost
  • Reflects mitochondrial dehydrogenase activity
  • Directly measures cell death
  • Can be applied for cell damage assay
  • High Product Stability
  • 51Cr is not required
  • Measuring wavelength near Phenol Red - necessary to subtract the control
  • Medium change is necessary
  • Preparation of Reagent Necessary
  • Necessary to dissolve formazan with organic solvent
  • Lower assay sensitivity than 51Cr method
  • Serum in the medium may interfere with the reading
Product Appearance Solution Solution Powder Solution + Freeze Dried Powder