Used in immunological research to quantify levels of galectin-9 in biological samples such as serum, plasma, and cell culture supernatants. Helps in studying inflammatory responses, autoimmune diseases, cancer progression, and immune regulation. Commonly applied in clinical research to assess biomarkers related to T-cell modulation, apoptosis, and pathogen recognition. Enables high-throughput analysis with reliable sensitivity and specificity for investigating galectin-9's role in disease mechanisms and therapeutic development.