Used in research to detect latency-associated peptide (LAP), a marker linked to regulatory T cells and immune suppression. Helps study autoimmune diseases, cancer immunology, and fibrotic conditions by identifying TGF-β activation pathways. Applied in flow cytometry, immunohistochemistry, and Western blotting to analyze immune cell populations and signaling mechanisms in tissue and blood samples. Supports development of targeted therapies by clarifying the role of LAP-expressing cells in disease progression.