Used in immunology research to quantitatively measure CD8 molecule levels in biological samples such as serum, plasma, or cell culture supernatants. Helps in studying T-cell activation and immune responses. Commonly applied in research related to viral infections, cancer immunology, and autoimmune diseases. Enables researchers to assess CD8+ T cell activity and monitor immune system changes under experimental conditions. Suitable for high-throughput screening and cytokine response studies.