Used in immunological research to quantify levels of CXCL13, a chemokine involved in B-cell recruitment and lymphoid tissue formation. The kit enables detection of CXCL13 in biological samples such as serum, plasma, and cell culture supernatants. Commonly applied in studies of autoimmune diseases like multiple sclerosis, rheumatoid arthritis, and lupus, where elevated CXCL13 levels correlate with disease activity. Also used in cancer research, particularly in B-cell lymphomas and tumors with lymphoid infiltrates, to assess the role of CXCL13 in tumor microenvironment and immune response. Supports investigation into neuroinflammation, including in cerebrospinal fluid analysis. Provides a reliable tool for monitoring therapeutic responses in clinical and preclinical settings.