Anti-polymerase (DNA) delta 4, accessory subunit antibodies are used in antigen-specific immunodetection in biological samples. The target polymerase (DNA) delta 4, accessory subunit is a known alias name of the protein DNA polymerase delta 4, accessory subunit, encoded by the POLD4 gene in humans. This 107-amino acid residue protein is known to be involved in DNA replication, among other biological processes. It is localized to the nucleus of the cell and features ubiquitinated post-translational modifications.