Used to quantitatively measure immunoglobulin M (IgM) levels in mouse biological samples such as serum, plasma, or cell culture supernatants. Commonly applied in immunology research to assess immune responses, evaluate B cell activity, and monitor infections or autoimmune diseases in mouse models. The kit enables high-throughput analysis with high specificity and sensitivity, making it suitable for preclinical studies, vaccine development, and toxicology assessments involving the murine immune system.