Used in immunological research to study cell adhesion and signaling processes involving the CEACAM1 receptor. Plays a role in assays evaluating immune cell interactions, tumor progression, and pathogen binding due to its involvement in intercellular recognition. The Fc tag enables easy detection and purification, and supports use in ELISA, flow cytometry, and protein-protein interaction studies. Commonly applied in therapeutic development for cancer and inflammatory diseases where CEACAM1 modulation is relevant.