Anti-CLDN19 antibodies are used in the immunodetection of the protein claudin 19. In humans, the canonical protein has a reported length of 224 amino acid residues and a mass of 23.2 kDa. Its subcellular localization is in the cell membrane. Up to 3 different isoforms have been reported for this protein. A member of the Claudin protein family, CLDN19 is known to play an important role in tight junction-specific obliteration of the intercellular space, through calcium-independent cell-adhesion activity. The CLDN19 gene has been associated with the disease, Hypomagnesemia. CLDN19 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of CLDN19 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunofluorescence are also common applications.