Ready-to-use ELISA kits are available for the detection of cleavage and polyadenylation specificity factor 3, an alias of the protein, cleavage and polyadenylation specific factor 3. The official gene symbol is CPSF3. The protein, with a mass of 77.5 kDa and length of 684 residues, is reported to be nuclear. It is a member of the Metallo-beta-lactamase superfamily, RNA-metabolizing metallo-beta-lactamase-like family, CPSF3 subfamily and may be known by other names, including: CPSF-73, mRNA 3'-end-processing endonuclease CPSF-73, cleavage and polyadenylation specific factor 3 73kDa, and cleavage and polyadenylation specificity factor subunit 3.