Anti-STARPAP antibodies enable researchers to detect and measure the STARPAP antigen in biological samples. This target is a reported synonym of the TUT1 gene, which encodes terminal uridylyl transferase 1, U6 snRNA-specific. This protein is reported to be a Poly(A) polymerase that creates the 3'-poly(A) tail of specific pre-mRNAs. The human version of STARPAP has a canonical amino acid length of 874 residues and a protein mass of 93.8 kilodaltons. It is reported to be localized in the nucleus of cells. STARPAP is a member of the DNA polymerase type-B-like protein family.