Anti-IgA antibodies enable researchers to detect and measure the IgA antigen in biological samples. This target is a reported synonym of the CD79A gene, which encodes CD79a molecule. This protein is known to function in adaptive immune responses and B cell differentiation, among other biological roles. The human version of IgA has a canonical amino acid length of 226 residues and a protein mass of 25 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells and notably expressed in the rectum, lymph node, colon, bone marrow, and appendix. Over 1500 citations in the literature describe the use of IgA antibodies in research. ELISA, Western Blot, and Immunohistochemistry are common applications for these antibodies.