Cathepsin S Assay Kit

Apoptosis can be mediated by mechanisms other than the traditional caspase-mediated cleavage cascade. There is growing recognition that alternative proteolytic enzymes such as the lysosomal cathepsin proteases may initiate or propagate proapoptotic signals. Cathepsins are lysosomal enzymes that are also used as sensitive markers in various toxicological investigations.

The kit is suitable for the measurement of cathepsin S in cell lysates.

The Cathepsin S Assay kit is a fluorescence-based assay that utilizes the preferred cathepsin S substrate sequence VVR labeled with AFC (amino-4-trifluoromethyl coumarin). Cell lysates or other samples that contain cathepsin S will cleave the synthetic substrate Z-VVR-AFC to release free AFC. The released AFC can easily be quantified fluorometrically. The cathepsin S assay is simple and straightforward. Assay conditions have been optimized to obtain the maximal activity.

Cathepsin S Activity Assay Kit:

• Simple procedure with results in 1-2 hours.