Anti-MUM1 antibodies enable researchers to detect and measure the MUM1 antigen in biological samples. This target is a reported synonym of the IRF4 gene, which encodes interferon regulatory factor 4. This protein is known to function in myeloid dendritic cell differentiation and the regulation of transcription, among other biological roles. The human version of MUM1 has a canonical amino acid length of 451 residues and a protein mass of 51.8 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the nucleus of cells and notably expressed in the rectum, lymph node, colon, bone marrow, and appendix. This target antigen may also be known as LSIRF. Some MUM1 antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.