Anti-MGC:9349 antibodies are protein reagents that detect specific antigens. The MGC:9349 antigen is another term for the human protein TATA-box binding protein associated factor, RNA polymerase I subunit B, encoded by the TAF1B gene. The 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. Canonically, it has an amino acid length of 588 residues and a mass of 68.8 kilodaltons. Its subcellular localization is in the nucleus. The MGC:9349 protein is a member of the RRN7/TAF1B protein family.