Used to measure perforin levels in human biological samples such as serum, plasma, or cell culture supernatants. Perforin is a protein involved in the immune response, primarily released by cytotoxic T cells and natural killer (NK) cells. This ELISA kit helps in assessing immune activation in research related to autoimmune diseases, viral infections, cancer, and transplant rejection. It enables quantitative analysis for studies on cell-mediated cytotoxicity and immune regulation. Commonly used in clinical research and immunology laboratories.