Used in research and diagnostic assays to detect sialyl-Lewis A (sLe^a) antigen, a tumor-associated carbohydrate antigen often overexpressed in gastrointestinal and pancreatic cancers. This antibody serves as a reference standard in immunoassays, flow cytometry, and immunohistochemistry to evaluate the specificity and sensitivity of other anti-sLe^a antibodies. It supports the development and validation of cancer detection methods, particularly in monitoring disease progression and assessing therapeutic response. Its high specificity makes it valuable in quality control for diagnostic kit manufacturing and in comparative studies of glycan expression in cancer cells.