Used in immunological research to quantify levels of CXCR3, a receptor involved in inflammatory responses, in biological samples such as serum, plasma, or cell culture supernatants. Helps study autoimmune diseases, cancer progression, and viral infections by measuring chemokine receptor expression. Commonly applied in preclinical studies to evaluate immune cell migration and therapeutic targeting of CXCR3 pathways. Suitable for use in research settings focused on inflammation, allergy, and immune modulation.