RecombinantRabMAb

Recombinant Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)

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Flow Cytometry - Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)
  • Immunocytochemistry/ Immunofluorescence - Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)
  • Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)

Key features and details

  • Produced recombinantly (animal-free) for high batch-to-batch consistency and long term security of supply
  • Alexa Fluor® 647 Rabbit monoclonal [EPR7314(B)] to CTCF
  • Suitable for: Flow Cyt, ICC/IF
  • Reacts with: Human
  • Conjugation: Alexa Fluor® 647. Ex: 652nm, Em: 668nm

Overview

  • Product name

    Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)]
    See all CTCF primary antibodies

  • Description

    Alexa Fluor® 647 Rabbit monoclonal [EPR7314(B)] to CTCF

  • Host species

    Rabbit

  • Conjugation

    Alexa Fluor® 647. Ex: 652nm, Em: 668nm

  • Tested applications

    Suitable for: Flow Cyt, ICC/IFmore details

  • Species reactivity

    Reacts with: Human

  • Immunogen

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

  • Positive control

    • ICC/IF: HeLa cells. Flow Cyt: HeLa cells.

  • General notes

    This product is a recombinant monoclonal antibody, which offers several advantages including:

    • - High batch-to-batch consistency and reproducibility
    • - Improved sensitivity and specificity
    • - Long-term security of supply
    • - Animal-free production
    For more information see here.

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

    Alexa Fluor® is a registered trademark of Molecular Probes, Inc, a Thermo Fisher Scientific Company. The Alexa Fluor® dye included in this product is provided under an intellectual property license from Life Technologies Corporation. As this product contains the Alexa Fluor® dye, the purchase of this product conveys to the buyer the non-transferable right to use the purchased product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). As this product contains the Alexa Fluor® dye the sale of this product is expressly conditioned on the buyer not using the product or its components, or any materials made using the product or its components, in any activity to generate revenue, which may include, but is not limited to use of the product or its components: in manufacturing; (ii) to provide a service, information, or data in return for payment (iii) for therapeutic, diagnostic or prophylactic purposes; or (iv) for resale, regardless of whether they are sold for use in research. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, 5781 Van Allen Way, Carlsbad, CA 92008 USA or outlicensing@thermofisher.com.

    Reproducibility is key to advancing scientific discovery and accelerating scientists’ next breakthrough.

    Abcam is leading the way with our range of recombinant antibodies, knockout-validated antibodies and knockout cell lines, all of which support improved reproducibility.

    We are also planning to innovate the way in which we present recommended applications and species on our product datasheets, so that only applications & species that have been tested in our own labs, our suppliers or by selected trusted collaborators are covered by our Abpromise™ guarantee.

    In preparation for this, we have started to update the applications & species that this product is Abpromise guaranteed for.

    We are also updating the applications & species that this product has been “predicted to work with,” however this information is not covered by our Abpromise guarantee.

    Applications & species from publications and Abreviews that have not been tested in our own labs or in those of our suppliers are not covered by the Abpromise guarantee.

    Please check that this product meets your needs before purchasing. If you have any questions, special requirements or concerns, please send us an inquiry and/or contact our Support team ahead of purchase. Recommended alternatives for this product can be found below, as well as customer reviews and Q&As.

Properties

Applications

Our Abpromise guarantee covers the use of ab203705 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
Flow Cyt 1/50.
ICC/IF 1/100.

This product gave a positive signal in HeLa cells fixed with 4% formaldehyde (10 min).

Target

  • Function

    Chromatin binding factor that binds to DNA sequence specific sites. Involved in transcriptional regulation by binding to chromatin insulators and preventing interaction between promoter and nearby enhancers and silencers. Acts as transcriptional repressor binding to promoters of vertebrate MYC gene and BAG1 gene. Also binds to the PLK and PIM1 promoters. Acts as a transcriptional activator of APP. Regulates APOA1/C3/A4/A5 gene cluster and controls MHC class II gene expression. Plays an essential role in oocyte and preimplantation embryo development by activating or repressing transcription. Seems to act as tumor suppressor. Plays a critical role in the epigenetic regulation. Participates to the allele-specific gene expression at the imprinted IGF2/H19 gene locus. On the maternal allele, binding within the H19 imprinting control region (ICR) mediates maternally inherited higher-order chromatin conformation to restrict enhancer access to IGF2. Plays a critical role in gene silencing over considerable distances in the genome. Preferentially interacts with unmethylated DNA, preventing spreading of CpG methylation and maintaining methylation-free zones. Inversely, binding to target sites is prevented by CpG methylation. Plays a important role in chromatin remodeling. Can dimerize when it is bound to different DNA sequences, mediating long-range chromatin looping. Mediates interchromosomal association between IGF2/H19 and WSB1/NF1 and may direct distant DNA segments to a common transcription factory. Causes local loss of histone acetylation and gain of histone methylation in the beta-globin locus, without affecting transcription. When bound to chromatin, it provides an anchor point for nucleosomes positioning. Seems to be essential for homologous X-chromosome pairing. May participate with Tsix in establishing a regulatable epigenetic switch for X chromosome inactivation. May play a role in preventing the propagation of stable methylation at the escape genes from X- inactivation. Involved in sister chromatid cohesion. Associates with both centromeres and chromosomal arms during metaphase and required for cohesin localization to CTCF sites. Regulates asynchronous replication of IGF2/H19.

  • Tissue specificity

    Ubiquitous. Absent in primary spermatocytes.

  • Sequence similarities

    Belongs to the CTCF zinc-finger protein family.
    Contains 11 C2H2-type zinc fingers.

  • Domain

    The 11 zinc fingers are highly conserved among vertebrates, exhibiting almost identical amino acid sequences. Different subsets or combination of individual zinc fingers gives the ability to CTCF to recognize multiple DNA target sites.

  • Post-translational
    modifications

    Sumoylated on Lys-74 and Lys-689; sumoylation of CTCF contributes to the repressive function of CTCF on the MYC P2 promoter.

  • Cellular localization

    Nucleus > nucleoplasm. Chromosome. Chromosome > centromere. May translocate to the nucleolus upon cell differentiation. Associates with both centromeres and chromosomal arms during metaphase. Associates with the H19 ICR in mitotic chromosomes. May be preferentially excluded from heterochromatin during interphase.
  • Information by UniProt

  • Database links

    • Alternative names

      • 11 zinc finger protein antibody
      • 11 zinc finger transcriptional repressor antibody
      • 11-zinc finger protein antibody
      • CCCTC binding factor (zinc finger protein) antibody
      • CCCTC binding factor antibody
      • CCCTC-binding factor antibody
      • Ctcf antibody
      • CTCF_HUMAN antibody
      • CTCFL paralog antibody
      • MRD21 antibody
      • Transcriptional repressor CTCF antibody
      see all

    Images

    • Flow Cytometry - Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)
      Flow Cytometry - Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)
      Overlay histogram showing HeLa cells stained with ab203705 (red line). The cells were fixed with 4% formaldehyde (10 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 (ab203705, 1/50 dilution) for 30 min at 22°C. Isotype control antibody (black line) was rabbit monoclonal IgG [EPR25A] Alexa Fluor® 647 (ab199093) used at the same concentration and conditions as the primary antibody. Unlabelled sample (blue line) was also used as a control. Acquisition of >5,000 events were collected using a solid-state 25mW red diode laser (635 nm) and 675/30 bandpass filter. This antibody gave a positive signal in HeLa cells fixed with 80% methanol (5 min)/permeabilized with 0.1% PBS-Tween for 20 min used under the same conditions.
    • Immunocytochemistry/ Immunofluorescence - Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)
      Immunocytochemistry/ Immunofluorescence - Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)

      ab203705 staining CTCF in HeLa cells. The cells were fixed with 4% formaldehyde (10 min), permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated overnight at +4°C with ab203705 at a 1/100 dilution (shown in red) and ab195887, Mouse monoclonal to alpha Tubulin (Alexa Fluor® 488), at a 1/250 dilution (shown in green). Nuclear DNA was labelled with DAPI (shown in blue).

      Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).

    • Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)
      Alexa Fluor® 647 Anti-CTCF antibody [EPR7314(B)] (ab203705)

    References (0)

    Publishing research using ab203705? Please let us know so that we can cite the reference in this datasheet.

    ab203705 has not yet been referenced specifically in any publications.

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