Anti-CDH21 antibodies enable researchers to detect and measure the CDH21 antigen in biological samples. This target is a reported synonym of the PCDHGA12 gene, which encodes protocadherin gamma subfamily A, 12. This protein is known to function in cell adhesion and nervous system development, among other biological roles. The human version of CDH21 has a canonical amino acid length of 932 residues and a protein mass of 101 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells.