Used in immunological research to quantify CX3CR1 levels in biological samples such as serum, plasma, and cell culture supernatants. Helps in studying inflammatory diseases, neuroinflammation, and immune cell migration. Commonly applied in neuroscience and immunology studies to assess fractalkine signaling activity. Supports research on conditions like Alzheimer's disease, atherosclerosis, and chronic pain where CX3CR1-mediated pathways play a role. Enables high-throughput screening in drug development targeting chemokine receptors.