This monoclonal antibody provides highly specific detection of Carcinoembryonic Antigen (CEA), a clinically relevant tumor‑associated marker. Clone 103 delivers strong affinity and low background in ELISA, Western blotting, immunohistochemistry, and antigen‑capture assays. It is well suited for oncology research, biomarker quantification, and assay development involving CEA‑expressing cells or purified antigen. MCEA‑80A‑103 offers consistent lot‑to‑lot performance, supporting reliable detection across diverse research and analytical applications.