Used in immunological research to quantify levels of immunosuppressive acid protein (IAP) in biological samples such as serum, plasma, or cell culture supernatants. This ELISA kit enables researchers to study immune modulation in conditions like cancer, autoimmune diseases, and chronic infections. It is particularly useful in monitoring disease progression and evaluating the effectiveness of therapeutic interventions that influence immune suppression. The assay provides a sensitive and specific means to detect IAP, supporting investigations into tumor immune evasion mechanisms and the regulation of inflammatory responses.