Anti-CLDN9 antibodies are used in the immunodetection of the protein claudin 9. In humans, the canonical protein has a reported length of 217 amino acid residues and a mass of 22.8 kDa. Its subcellular localization is in the cell membrane. It is reported to be expressed in the liver, in peripheral blood mononuclear cells and hepatocarcinoma cell lines. A member of the Claudin protein family, CLDN9 is known to play an important role in tight junction-specific obliteration of the intercellular space, through calcium-independent cell-adhesion activity. The CLDN9 gene has been associated with the disease, Deafness. Synonyms for this target antigen include DFNB116. CLDN9 gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. A number of CLDN9 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.