M3(Fuc6)-biotin is primarily used in glycan analysis and glycomics research. It serves as a valuable tool for studying carbohydrate-protein interactions, particularly in the context of cell surface recognition and signaling processes. The biotin tag allows for efficient immobilization or detection using streptavidin-based systems, making it useful in assays like ELISA, flow cytometry, and surface plasmon resonance (SPR). Its fucosylated structure is particularly relevant in investigating roles of fucose-containing glycans in immune response, cancer biology, and microbial adhesion. Additionally, it is employed in the development of diagnostic tools and therapeutic agents targeting glycan-mediated pathways.