The Cathepsin K Inhibitor Screening Assay Kit is designed to measure the protease activity of Cathepsin K for screening and profiling applications. The Cathepsin K assay kit comes in a convenient 96-well or 384-well format, with enough purified Cathepsin K, its substrate, and Cathepsin Buffer for 96 or 384 reactions. This kit includes the inhibitor E-64 as control.

Figure 1: Illustration of the assay principle.
The substrate is an internally quenched flourogenic substrate.Proteolysis releases the highly flourescent Mca from the quencher. Flourescence intensity increases proportionally to the activity og the protease.