Recombinant Anti-Topoisomerase I antibody [EPR5376(2)] - BSA and Azide free (ab240047)


  • Product name

    Anti-Topoisomerase I antibody [EPR5376(2)] - BSA and Azide free
    See all Topoisomerase I primary antibodies
  • Description

    Rabbit monoclonal [EPR5376(2)] to Topoisomerase I - BSA and Azide free
  • Host species

  • Tested applications

    Suitable for: ICC/IF, WBmore details
    Unsuitable for: Flow Cyt,IHC-P or IP
  • Species reactivity

    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthetic peptide within Human Topoisomerase I aa 700-800. The exact sequence is proprietary.

  • General notes

    Ab240047 is the carrier-free version of ab131166. This format is designed for use in antibody labeling, including fluorochromes, metal isotopes, oligonucleotides, enzymes.


    Our carrier-free formats are supplied in a buffer free of BSA, sodium azide and glycerol for higher conjugation efficiency.

    Use our conjugation kits  for antibody conjugates that are ready-to-use in as little as 20 minutes with <1 minute hands-on-time and 100% antibody recovery: available for fluorescent dyes, HRP, biotin and gold.

    ab240047 is compatible with the Maxpar® Antibody Labeling Kit from Fluidigm.

    Maxpar® is a trademark of Fluidigm Canada Inc.

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

    This product is a recombinant rabbit monoclonal antibody.



Our Abpromise guarantee covers the use of ab240047 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
ICC/IF Use at an assay dependent concentration.
WB Use at an assay dependent concentration. Detects a band of approximately 95 kDa (predicted molecular weight: 91 kDa).
  • Application notes
    Is unsuitable for Flow Cyt,IHC-P or IP.
  • Target

    • Function

      The reaction catalyzed by topoisomerases leads to the conversion of one topological isomer of DNA to another.
    • Involvement in disease

      Note=A chromosomal aberration involving TOP1 is found in a form of therapy-related myelodysplastic syndrome. Translocation t(11;20)(p15;q11) with NUP98.
    • Sequence similarities

      Belongs to the eukaryotic type I topoisomerase family.
    • Post-translational

      Sumoylated. Lys-117 is the main site of sumoylation. Sumoylation plays a role in partitioning TOP1 between nucleoli and nucleoplasm. Levels are dramatically increased on camptothecin (CPT) treatment.
    • Cellular localization

      Nucleus > nucleolus. Nucleus > nucleoplasm. Diffuse nuclear localization with some enrichment in nucleoli. On CPT treatment, cleared from nucleoli into nucleoplasm. Sumolyated forms found in both nucleoplasm and nucleoli.
    • Information by UniProt
    • Database links

    • Alternative names

      • DNA topoisomerase 1 antibody
      • DNA topoisomerase I antibody
      • NUP98 fusion gene antibody
      • TOP 1 antibody
      • TOP I antibody
      • TOP1 antibody
      • TOP1_HUMAN antibody
      • TOPI antibody
      • Topoisomerase (DNA) I antibody
      • Topoisomerase 1 antibody
      • Topoisomerase1 antibody
      • TopoisomeraseI antibody
      • Type I DNA topoisomerase antibody
      see all


    • Immunocytochemistry/Immunofluorescence analysis of HaCaT (Human keratinocyte cell line) labelling Topoisomerase I with purified ab131166 at 1/500. Cells were fixed with 4% PFA and permeabilized with 0.1% triton X-100. ab150077 Goat anti rabbit IgG (Alexa Fluor® 488) at 1/1000 was used as the secondary antibody. Nuclei were counterstained with DAPI. PBS was used instead of the primary antibody as the negative control.

      This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab131166).

    • Immunofluorescent analysis of MCF7 cells labelling Topoisomerase I with ab131166 at 1/250 dilution.

      This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab131166).

    • Equilibrium disassociation constant (KD)
      Learn more about KD

      Click here to learn more about KD

      This data was developed using the same antibody clone in a different buffer formulation containing PBS, BSA, glycerol, and sodium azide (ab131166).


    ab240047 has not yet been referenced specifically in any publications.

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