Anti-ANPK antibodies enable researchers to detect and measure the ANPK antigen in biological samples. This target is a reported synonym of the HIPK3 gene, which encodes homeodomain interacting protein kinase 3. This protein is known to function in the apoptotic pathway, among other biological roles. The human version of ANPK has a canonical amino acid length of 1215 residues and a protein mass of 133.7 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the nucleus and cytoplasm of cells and widely expressed in many tissue types. Other names for this target antigen include DYRK6, FIST3, and PKY.