Used in biomedical research to quantify Cathepsin S levels in biological samples such as serum, plasma, and tissue homogenates. Enables study of protease activity linked to inflammatory diseases, autoimmune disorders, and cancer progression. Supports investigation into immune response mechanisms due to Cathepsin S role in antigen presentation. Facilitates drug development and evaluation of therapeutic efficacy in preclinical models targeting cysteine proteases. Provides a reliable, sensitive, and specific method for high-throughput screening in research laboratories.