Anti-HRK antibodies are used in the immunodetection of the protein harakiri, BCL2 interacting protein. In humans, the canonical protein has a reported length of 91 amino acid residues and a mass of 9.9 kDa. Its subcellular localization is in the mitochondria and membrane. HRK is reported to promote apoptosis. Synonyms for this target antigen include HARAKIRI, activator of apoptosis harakiri, BH3-interacting domain-containing protein 3, activator of apoptosis Hrk, and DP5. HRK gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. A number of Hrk antibodies have been mentioned in research publications and have associated citations. ELISA, Western Blot, and Immunohistochemistry are common applications for these antibodies.