Anti-BRD4 antibodies are used in the immunodetection of the protein bromodomain containing 4. In humans, the canonical protein has a reported length of 1362 amino acid residues and a mass of 152.2 kDa. Its subcellular localization is in the nucleus. Up to 3 different isoforms have been reported for this protein. It is ubiquitously expressed across many tissue types. BRD4 is known to be involved with chromatin remodeling and DNA damage pathways. Post-translational modifications have been described, including acetylation and phosphorylation. Synonyms for this target antigen include FSHRG4, HUNK1, HUNKI, MCAP, bromodomain-containing protein 4, and CAP. BRD4 gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Over 390 citations in the literature describe the use of BRD4 antibodies in research. Western Blot is a widely used application for these antibodies. Immunofluorescence and Immunohistochemistry are also common applications.