Elevated cathepsin enzyme activity often indicates the presence of a pathological condition including cancer, Alzheimer's disease, autoimmune disease, and osteoporosis. Based on the dye cresyl violet and the cathepsin B ArgArg peptide recognition sequence, this kit allows the detection of cathepsin B activity in living cells by fluorescence microscopy. Once cells are grown, staining is completed in just a few minutes. Hoechst 33342 stain and Acridine Orange are also included to allow visualization of nuclei and lysosomes. Product Specification Kit/Set Contains: CV-(RR)2 reagent, Acridine Orange, Hoechst 33342 stain Shipping: SHIPPED ON BLUE ICE Long Term Storage: +4°C