This antibody recognizes a carbohydrate epitope present on tumor-associated Lewis y antigen (Fucalpha1-2Galbeta1-4/3[Fucalpha1-3/4]GlcNAcbeta-). Lewis y is expressed in large bowel tumors and colorectal carcinomas. It may be useful in the classification of human renal and bladder tumors. The Lewis y antigen has been evaluated as a clinical marker for the diagnosis and prognosis of cholangiocarcinoma, hepatocellular carcinoma and breast cancer.

Store the Lewis y antibody at 2-8°C (with azide) or aliquot and store at -20°C or colder (without azide).