Anti-CCAR2 antibodies are used in the immunodetection of the protein cell cycle and apoptosis regulator 2. In humans, the canonical protein has a reported length of 923 amino acid residues and a mass of 102.9 kDa. Its subcellular localization is in the nucleus and cytoplasm. Up to 2 different isoforms have been reported for this protein. It is reported to be expressed in gastric carcinoma tissue and the expression gradually increases with the progression of the carcinoma. CCAR2 is an important component of the DBIRD complex, a multiprotein complex that acts at the interface between core mRNP particles and RNA polymerase II (RNAPII) and integrates transcript elongation with the regulation of alternative splicing: the DBIRD complex affects local transcript elongation rates and alternative splicing of a large set of exons embedded in (A + T)-rich DNA regions. Synonyms for this target antigen include cell division cycle and apoptosis regulator protein 2, deleted in breast cancer 1, and cell cycle and apoptosis regulator protein 2. Over 50 citations in the literature describe the use of CCAR2 antibodies in research. Western Blot is a widely used application for these antibodies. Immunofluorescence and Immunohistochemistry are also common applications.