Date published: 2026-4-20

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TFIIIB90-1/4 Antibody (B-8): sc-271970

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  • TFIIIB90-1/4 Antibody (B-8) is a mouse monoclonal IgG1 κ TFIIIB90-1/4 antibody provided at 200 µg/ml
  • raised against amino acids 1-120 mapping at the N-terminus of TFIIIB90 -1 of human origin
  • TFIIIB90-1/4 Antibody (B-8) is recommended for detection of TFIIIB90 isoforms 1 and 4 of mouse, rat and human origin by WB, IP, IF and ELISA
  • Anti-TFIIIB90-1/4 Antibody (B-8) is available conjugated to agarose for IP; HRP for WB, IHC(P) and ELISA; and to either phycoerythrin or FITC for IF, IHC(P) and FCM
  • also available conjugated to Alexa Fluor® 488, Alexa Fluor® 546, Alexa Fluor® 594 or Alexa Fluor® 647 for WB (RGB), IF, IHC(P) and FCM, and for use with RGB fluorescent imaging systems, such as iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • also available conjugated to Alexa Fluor® 680 or Alexa Fluor® 790 for WB (NIR), IF and FCM; for use with Near-Infrared (NIR) detection systems, such as LI-COR®Odyssey®, iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • TransCruz reagent for ChIP application (sc-271970 X, 200 µg/0.1 ml)
  • m-IgG Fc BP-HRP and m-IgG1 BP-HRP are the preferred secondary detection reagents for TFIIIB90-1/4 Antibody (B-8) for WB applications. These reagents are now offered in bundles with TFIIIB90-1/4 Antibody (B-8) (see ordering information below).
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    TFIIIB90-1/4 Antibody (B-8) is a mouse monoclonal IgG1 kappa light chain antibody that detects TFIIIB90-1/4 of mouse, rat, and human origin by western blotting (WB), immunoprecipitation (IP), immunofluorescence (IF), and enzyme-linked immunosorbent assay (ELISA). TFIIIB90-1/4 (B-8) antibody is available in both non-conjugated and various conjugated forms, including agarose, horseradish peroxidase (HRP), phycoerythrin (PE), fluorescein isothiocyanate (FITC), and multiple Alexa Fluor® conjugates. TFIIIB90-1/4 plays a crucial role in the transcription of small nuclear RNAs and is essential for the proper functioning of RNA polymerase III, which synthesizes tRNA, 5S rRNA, 7SL RNA, and U6 snRNA. TFIIIB90-1/4 is particularly important because of its involvement in regulating gene expression necessary for cell growth and proliferation. In many transformed cell lines and tumors, overexpression of TFIIIB and associated complexes, such as TFIIIC2, is observed, indicating a link between TFIIIB90-1/4 and cancer progression. TFIIIC2 complex, which includes several subunits, is critical for recruiting RNA polymerase III to promoter elements, thereby facilitating transcription of genes vital for rapid cell division. Dysregulation of these transcription factors, particularly with inactivated tumor suppressors like retinoblastoma (RB) and p53, highlights TFIIIB90-1/4′s significance in oncogenesis and potential as a target for therapeutic intervention.

    For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

    Alexa Fluor® is a trademark of Molecular Probes Inc., OR., USA

    LI-COR® and Odyssey® are registered trademarks of LI-COR Biosciences

    TFIIIB90-1/4 Antibody (B-8) References:

    1. The TFIIIC90 subunit of TFIIIC interacts with multiple components of the RNA polymerase III machinery and contains a histone-specific acetyltransferase activity.  |  Hsieh, YJ., et al. 1999. Mol Cell Biol. 19: 7697-704. PMID: 10523658
    2. Interactions between the tetratricopeptide repeat-containing transcription factor TFIIIC131 and its ligand, TFIIIB70. Evidence for a conformational change in the complex.  |  Moir, RD., et al. 2000. J Biol Chem. 275: 26591-8. PMID: 10859316
    3. Alternatively spliced hBRF variants function at different RNA polymerase III promoters.  |  McCulloch, V., et al. 2000. EMBO J. 19: 4134-43. PMID: 10921893
    4. Different human TFIIIB activities direct RNA polymerase III transcription from TATA-containing and TATA-less promoters.  |  Schramm, L., et al. 2000. Genes Dev. 14: 2650-63. PMID: 11040218
    5. RNA polymerase III transcription factor TFIIIC2 is overexpressed in ovarian tumors.  |  Winter, AG., et al. 2000. Proc Natl Acad Sci U S A. 97: 12619-24. PMID: 11058163
    6. Retinoblastoma protein disrupts interactions required for RNA polymerase III transcription.  |  Sutcliffe, JE., et al. 2000. Mol Cell Biol. 20: 9192-202. PMID: 11094071
    7. RNA polymerase III transcription: its control by tumor suppressors and its deregulation by transforming agents.  |  Brown, TR., et al. 2000. Gene Expr. 9: 15-28. PMID: 11097422
    8. Kinetic trapping of DNA by transcription factor IIIB.  |  Cloutier, TE., et al. 2001. Proc Natl Acad Sci U S A. 98: 9581-6. PMID: 11481428
    9. Activation of mouse genes in transformed cells.  |  Scott, MR., et al. 1983. Cell. 34: 557-67. PMID: 6311432
    10. Structure and function of a human transcription factor TFIIIB subunit that is evolutionarily conserved and contains both TFIIB- and high-mobility-group protein 2-related domains.  |  Wang, Z. and Roeder, RG. 1995. Proc Natl Acad Sci U S A. 92: 7026-30. PMID: 7624363
    11. Cloning and functional characterization of the gene encoding the TFIIIB90 subunit of RNA polymerase III transcription factor TFIIIB.  |  Roberts, S., et al. 1996. J Biol Chem. 271: 14903-9. PMID: 8662956
    12. Expression of neural BC1 RNA: induction in murine tumours.  |  Chen, W., et al. 1997. Eur J Cancer. 33: 288-92. PMID: 9135502

    Ordering Information

    Product NameCatalog #UNITPriceQtyFAVORITES

    TFIIIB90-1/4 Antibody (B-8)

    sc-271970
    200 µg/ml
    $322.00

    TFIIIB90-1/4 Antibody (B-8): m-IgG Fc BP-HRP Bundle

    sc-527312
    200 µg Ab; 10 µg BP
    $361.00

    TFIIIB90-1/4 Antibody (B-8): m-IgG1 BP-HRP Bundle

    sc-532685
    200 µg Ab; 20 µg BP
    $361.00

    TFIIIB90-1/4 Antibody (B-8) X

    sc-271970 X
    200 µg/0.1 ml
    $322.00

    TFIIIB90-1/4 Antibody (B-8) AC

    sc-271970 AC
    500 µg/ml, 25% agarose
    $424.00

    TFIIIB90-1/4 Antibody (B-8) HRP

    sc-271970 HRP
    200 µg/ml
    $322.00

    TFIIIB90-1/4 Antibody (B-8) FITC

    sc-271970 FITC
    200 µg/ml
    $336.00

    TFIIIB90-1/4 Antibody (B-8) PE

    sc-271970 PE
    200 µg/ml
    $349.00

    TFIIIB90-1/4 Antibody (B-8) Alexa Fluor® 488

    sc-271970 AF488
    200 µg/ml
    $364.00

    TFIIIB90-1/4 Antibody (B-8) Alexa Fluor® 546

    sc-271970 AF546
    200 µg/ml
    $364.00

    TFIIIB90-1/4 Antibody (B-8) Alexa Fluor® 594

    sc-271970 AF594
    200 µg/ml
    $364.00

    TFIIIB90-1/4 Antibody (B-8) Alexa Fluor® 647

    sc-271970 AF647
    200 µg/ml
    $364.00

    TFIIIB90-1/4 Antibody (B-8) Alexa Fluor® 680

    sc-271970 AF680
    200 µg/ml
    $364.00

    TFIIIB90-1/4 Antibody (B-8) Alexa Fluor® 790

    sc-271970 AF790
    200 µg/ml
    $364.00