Mammaglobin A,also known as SCGB2A2,is a member of the secretoglobin superfamily. Mammaglobin A is a breast cancer-associated antigen almost exclusively over-expressed in primary and metastatic human breast cancers,making it a specific molecular marker and a potential therapeutic target for breast cancer. This monoclonal antibody is raised against full-length of 93-amino acid human mammaglobin A.