What is the optimal pH range for protease activity detection using the EnzChek Protease Assay Kit?
The digestion buffer provided in the kit (pH 7.8) is recommended for detecting the protease activity of most proteolytic enzymes with activity optima from pH 7.4 to 8.0. However, if you are working with an enzyme that requires activation compounds or a unique pH environment, then prepare the specific buffer required in place of the digestion buffer.
What is the shelf life for EnzChek Protease Assay kits (Cat. Nos. E6638, E6639)?
As stated in the manual (https://assets.thermofisher.com/TFS-Assets/LSG/manuals/mp06638.pdf) on page 2 under section "Storage and Handling", these kits are stable for 6-12 months if stored as indicated.