Ready-to-use ELISA kits are available for the detection of polymerase (DNA directed), delta 1, catalytic subunit, an alias of the protein, DNA polymerase delta 1, catalytic subunit. The official gene symbol is POLD1. The protein, with a mass of 123.6 kDa and length of 1107 residues, is reported to be nuclear. It is a member of the DNA polymerase type-B family and may be known by other names, including: CRCS10, CDC2, polymerase (DNA directed) delta 1 catalytic subunit 125kDa, DNA polymerase subunit delta p125, CDC2 homolog, and DNA polymerase delta catalytic subunit, and POLD.