Used in research settings to quantitatively measure levels of Transcobalamin Protein I (TCN1) in human biological samples such as serum or plasma. This assay helps in studying vitamin B12 transport and metabolism, as TCN1 binds and carries cobalamin in the bloodstream. Researchers use this kit to investigate conditions related to B12 deficiency, malabsorption syndromes, and certain hematological or neurological disorders. It is also applied in clinical studies exploring the role of TCN1 in inflammation, cancer, and autoimmune diseases where B12 dynamics may be altered. The kit supports high-throughput analysis with reliable sensitivity and specificity, making it suitable for both basic research and diagnostic development.