Anti-CLDN4 antibodies are used in the immunodetection of the protein claudin 4. In humans, the canonical protein has a reported length of 209 amino acid residues and a mass of 22.1 kDa. Its subcellular localization is in the cell membrane. It is notably widely expressed in many tissue types. A member of the Claudin protein family, CLDN4 is known to be involved with cell adhesion and the regulation of cell migration. Post-translational modifications have been described, including phosphorylation. Synonyms for this target antigen include CPER, CPETR, CPETR1, WBSCR8, hCPE-R, CPE-receptor, Clostridium perfringens enterotoxin receptor 1, and CPE-R. CLDN4 gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. Over 380 citations in the literature describe the use of CLDN4 antibodies in research. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.