Anti-RNA polymerase II RPB1 antibody [EPR1509Y] (ab76123)


  • Product name
    Anti-RNA polymerase II RPB1 antibody [EPR1509Y]
    See all RNA polymerase II RPB1 primary antibodies
  • Description
    Rabbit monoclonal [EPR1509Y] to RNA polymerase II RPB1
  • Host species
  • Tested applications
    Suitable for: WB, ICC, Flow Cyt, ChIPmore details
    Unsuitable for: IHC-P or IP
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide within Human RNA polymerase II RPB1 aa 100-200 (N terminal). The exact sequence is proprietary.

  • Positive control
    • HeLa cell lysate.
  • General notes

    Mouse, Rat: We have preliminary internal testing data to indicate this antibody may not react with these species. Please contact us for more information.


    Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMab® patents

    We are constantly working hard to ensure we provide our customers with best in class antibodies. As a result of this work we are pleased to now offer this antibody in purified format. We are in the process of updating our datasheets. The purified format is designated 'PUR' on our product labels. If you have any questions regarding this update, please contact our Scientific Support team.

    This product is a recombinant rabbit monoclonal antibody.


Associated products


Our Abpromise guarantee covers the use of ab76123 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB 1/500 - 1/1000. Detects a band of approximately 270 kDa (predicted molecular weight: 217 kDa).
ICC 1/50.
Flow Cyt 1/100 - 1/1000.

ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.

ChIP Use at an assay dependent concentration. PubMed: 22249179
  • Application notes
    Is unsuitable for IHC-P or IP.
  • Target

    • Relevance
      RPB1 is a subunit of RNA polymerase II which catalyses transcription of RNA from DNA. RPB1 forms the polymerase active center together with the second largest subunit. Pol II is the central component of the basal RNA polymerase II transcription machinery. It is composed of mobile elements that move relative to each other. RPB1 is part of the core element with the central large cleft, the clamp element that moves to open and close the cleft and the jaws that are thought to grab the incoming DNA template.
    • Cellular localization
    • Database links
    • Alternative names
      • DNA directed RNA polymerase II subunit RPB1 antibody
      • hRPB220 antibody
      • hsRPB1 antibody
      • POLR2 antibody
      • POLR2A antibody
      • POLRA antibody
      • polymerase (RNA) II (DNA directed) polypeptide A, 220kDa antibody
      • RNA polymerase II subunit 1 antibody
      • RNA polymerase II subunit B1 antibody
      • RP02 antibody
      • RPB220 antibody
      • RPBh1 antibody
      • RpIILS antibody
      • RPO21 antibody
      • RPOL2 antibody
      • SUA8 antibody
      see all


    • Overlay histogram showing HeLa cells stained with ab76123 (red line). The cells were fixed with 80% methanol (5 min)/ and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab76123, 1/1000 dilution) for 30 min at 22°C. The secondary antibody used was Alexa Fluor® 488 goat anti-rabbit IgG (H&L) (ab150077) at 1/2000 dilution for 30 min at 22°C. Isotype control antibody (black line) was rabbit IgG (monoclonal) (0.1μg/1x106 cells) used under the same conditions. Unlabelled sample (blue line) was also used as a control. Acquisition of >5,000 events were collected using a 20mW Argon ion laser (488nm) and 525/30 bandpass filter.
    • Anti-RNA polymerase II RPB1 antibody [EPR1509Y] (ab76123) at 1/2000 dilution + HeLa cell lysate at 10 µg

      Goat anti-rabbit HRP at 1/2000 dilution

      Predicted band size: 217 kDa
      Observed band size: 270 kDa (why is the actual band size different from the predicted?)


    This product has been referenced in:
    • Liu X  et al. HIST1H1C Regulates Interferon-ß and Inhibits Influenza Virus Replication by Interacting with IRF3. Front Immunol 8:350 (2017). ChIP ; Human . Read more (PubMed: 28392790) »
    • Lavigne MD  et al. Global unleashing of transcription elongation waves in response to genotoxic stress restricts somatic mutation rate. Nat Commun 8:2076 (2017). Read more (PubMed: 29233992) »

    See all 5 Publications for this product

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