Anti-Bak antibodies enable researchers to detect and measure the Bak antigen in biological samples. This target is a reported synonym of the BAK1 gene, which encodes BCL2 antagonist/killer 1. This protein is known to function in pathways of aging and the apoptotic pathway, among other biological roles. The human version of Bak has a canonical amino acid length of 211 residues and a protein mass of 23.4 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the mitochondria of cells and widely expressed in many tissue types. This target antigen may also be known as BAK-LIKE. Over 460 citations in the literature describe the use of Bak antibodies in research. Western Blot is a widely used application for these antibodies. ELISA, Immunocytochemistry, Immunofluorescence, and Immunohistochemistry are also common applications.