Caspase-9 Colorimetric Assay Kit
The Caspase-9 Colorimetric Assay Kit is designed to provides a simple and convenient means for assaying the activity of caspases that recognize the sequence LEHD. The assay is based on spectrophotometric detection of the chromophore p-nitroanilide (pNA) after cleavage from the labeled substrate LEHD-pNA. The pNA light emission can be quantified using a spectrophotometer or a microtiter plate reader at 400- or 405-nm. Comparison of the absorbance of pNA from an apoptotic sample with an uninduced control allows determination of the fold increase in Caspase-9 activity.
LEHD-pNA (4 mM) Substrate: 500 μL
1 M dithiothreitol (DTT): 400 μL
Lysis Buffer: 100 mL
2X Reaction Buffer: 10 ml
Store at ≤ -20 °C for up to 6 months after initial use. Avoid repeated freeze-thaw cycles.
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