Anti-translocator protein antibodies are used for the immunodetection of the protein encoded by the TSPO gene. In humans, the canonical protein has a reported length of 169 amino acid residues and a mass of 18.8 kDa. Its subcellular localization is in the mitochondria. Alternative splicing is reported to yield 2 different isoforms for this protein. A member of the TspO/BZRP protein family, it is known to be involved with pathways of aging and the cellular response to lipopolysaccharides. Other names for this target antigen include BZRP, DBI, IBP, MBR, PBR, PBS, PKBS, and BPBS. Gene orthologs have been identified in the mouse, rat, bovine, zebrafish, chimpanzee and chicken species. Over 120 citations in the literature describe the use of translocator protein antibodies in research. Western Blot is a widely used application for these antibodies. Immunofluorescence and Immunohistochemistry are also common applications.