Anti-BOK antibodies are used in the immunodetection of the protein BCL2 family apoptosis regulator BOK. In humans, the canonical protein has a reported length of 212 amino acid residues and a mass of 23.3 kDa. Up to 2 different isoforms have been reported for this protein. It is notably expressed in oocytes; weak expression in granulosa cells of the developing follicles. A member of the Bcl-2 protein family, BOK is reported to be an apoptosis regulator that functions through different apoptotic signaling pathways. Synonyms for this target antigen include BOKL, bcl-2-related ovarian killer protein, BCL2 related ovarian killer, BOK, BCL2 family apoptosis regulator, bcl-2-like protein 9, and BCL2L9. BOK gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of BOK antibodies have been mentioned in research publications and have associated citations. ELISA is a widely used application for these antibodies. Western Blot and Immunohistochemistry are also common applications.