Anti-TATA box-binding protein-associated factor RNA polymerase I subunit B antibodies enable researchers to detect and measure the TATA box-binding protein-associated factor RNA polymerase I subunit B antigen in biological samples. This target is a reported synonym of the TAF1B gene, which encodes TATA-box binding protein associated factor, RNA polymerase I subunit B. This protein is known to be a component of RNA polymerase I core factor complex that acts as a GTF2B/TFIIB-like factor and plays a key role in multiple steps during transcription initiation such as pre-initiation complex (PIC) assembly and postpolymerase recruitment events in polymerase I (Pol I) transcription. The human version of TATA box-binding protein-associated factor RNA polymerase I subunit B has a canonical amino acid length of 588 residues and a protein mass of 68.8 kilodaltons. It is reported to be localized in the nucleus of cells.