Currently we are using the MTT assay to determine cell viability, but we experience the loss of the formed formazan and we are looking for an alternative assay to replace our MTT.
I have used ATPLite 1 step assay (PerkinElmer) which measures ATP in the sample. It is a luminescent assay, so you will need an appropriate plate reader.
Hi Anke, I have used the CCK-8 assay and can recommend this also. It has better sensitivity than some of the other WST salt assays. Alternatively, other options like Trypan blue staining or Alamar blue may work just as well for you.