Anti-B9D1 antibodies are used in the immunodetection of the protein B9 domain containing 1. In humans, the canonical protein has a reported length of 204 amino acid residues and a mass of 22.8 kDa. Its subcellular localization is in the cytoplasm. Up to 2 different isoforms have been reported for this protein. It is notably widely expressed in many tissue types. A member of the B9D protein family, B9D1 is a known component of the tectonic-like complex, a complex localized at the transition zone of primary cilia and acting as a barrier that prevents diffusion of transmembrane proteins between the cilia and plasma membranes. Synonyms for this target antigen include EPPB9, JBTS27, MKS9, MKSR-1, MKSR1, B9 domain-containing protein 1, B9 protein domain 1, and B9. B9D1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Some B9D1 antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. ELISA, Immunocytochemistry, Immunofluorescence, and Immunohistochemistry are also common applications.