Used in research and diagnostic applications to detect MUC1, a glycoprotein overexpressed in various cancers such as breast, pancreatic, and ovarian cancer. Helps in studying tumor biology, monitoring disease progression, and evaluating therapeutic responses. Commonly employed in immunoassays, flow cytometry, and immunohistochemistry to identify MUC1 expression in cell and tissue samples. Also serves as a reference standard in the development of anti-MUC1 therapeutics and diagnostic antibodies.