• Product nameAnti-Oct4 antibody [EPR2054]
    See all Oct4 primary antibodies
  • Description
    Rabbit monoclonal [EPR2054] to Oct4
  • Tested applicationsSuitable for: WB, IP, IHC-P, Flow Cytmore details
    Unsuitable for: ICC
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide (the amino acid sequence is considered to be commercially sensitive) corresponding to Human Oct4 aa 250-350.

  • Positive control
    • Seminoma, NCCIT and HeLa cell lysates; Human ovarian dysgerminoma tissue.
  • General notes

    This product is a recombinant rabbit monoclonal antibody.

    Produced using Abcam’s RabMAb® technology. RabMAb® technology is covered by the following U.S. Patents, No. 5,675,063 and/or 7,429,487.

    A trial size is available to purchase for this antibody.

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

    Alternative versions available:

    Anti-Oct4 antibody (Alexa Fluor® 488) [EPR2054] (ab194074)
    Anti-Oct4 antibody (HRP) [EPR2054] (ab194076)



Our Abpromise guarantee covers the use of ab109183 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 1/1000 - 1/10000. Predicted molecular weight: 39 kDa.
IP 1/10 - 1/100.
IHC-P 1/500 - 1/1000. Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.
Flow Cyt 1/10 - 1/100. ab172730-Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.
  • Application notesIs unsuitable for ICC.
  • Target

    • FunctionTranscription factor that binds to the octamer motif (5'-ATTTGCAT-3'). Forms a trimeric complex with SOX2 on DNA and controls the expression of a number of genes involved in embryonic development such as YES1, FGF4, UTF1 and ZFP206. Critical for early embryogenesis and for embryonic stem cell pluripotency.
    • Tissue specificityExpressed in developing brain. Highest levels found in specific cell layers of the cortex, the olfactory bulb, the hippocampus and the cerebellum. Low levels of expression in adult tissues.
    • Sequence similaritiesBelongs to the POU transcription factor family. Class-5 subfamily.
      Contains 1 homeobox DNA-binding domain.
      Contains 1 POU-specific domain.
    • Developmental stageHighly expressed in undifferentiated embryonic stem cells and expression decreases gradually after embryoid body (EB) formation.
    • DomainThe POU-specific domain mediates interaction with PKM2.
    • Post-translational
      Sumoylation enhances the protein stability, DNA binding and transactivation activity. Sumoylation is required for enhanced YES1 expression.
      Ubiquitinated; undergoes 'Lys-63'-linked polyubiquitination by WWP2 leading to proteasomal degradation.
    • Cellular localizationNucleus. Expressed in a diffuse and slightly punctuate pattern.
    • Information by UniProt
    • Database links
    • Alternative names
      • Octamer binding transcription factor 4 antibody
      • MGC22487 antibody
      • Oct 3 antibody
      • Oct 4 antibody
      • Oct-3 antibody
      • Oct-4 antibody
      • OCT3 antibody
      • Oct4 antibody
      • Octamer binding protein 3 antibody
      • Octamer binding protein 4 antibody
      • Octamer binding transcription factor 3 antibody
      • Octamer-binding protein 3 antibody
      • Octamer-binding protein 4 antibody
      • Octamer-binding transcription factor 3 antibody
      • OTF 3 antibody
      • OTF 4 antibody
      • OTF-3 antibody
      • OTF3 antibody
      • OTF4 antibody
      • PO5F1_HUMAN antibody
      • POU class 5 homeobox 1 antibody
      • POU domain class 5 transcription factor 1 antibody
      • POU domain transcription factor OCT4 antibody
      • POU domain, class 5, transcription factor 1 antibody
      • POU-type homeodomain-containing DNA-binding protein antibody
      • POU5F1 antibody
      see all

    Anti-Oct4 antibody [EPR2054] images

    • Predicted band size : 39 kDa

      Lane 1: Wild type HAP1 whole cell lysate (20 µg)
      Lane 2: POU5F1 (KO) knockout HAP1 whole cell lysate (20 µg)
      Lanes 1 - 2: Merged signal (red and green). Green - ab109183 observed at 38 kDa. Red - loading control, ab18058, observed at 130 kDa.

      ab109183 was shown to specifically react with POU5F1 (KO) when POU5F1 (KO) knockout samples were used. Wild-type and POU5F1 (KO) knockout samples were subjected to SDS-PAGE. Ab109183 and ab18058 (Mouse anti Vinculin loading control) were incubated overnight at 4°C at 1000 dilution and 1/10000 dilution respectively. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preabsorbed ab216773 and Goat anti-Mouse IgG H&L (IRDye® 680RD) preabsorbed ab216776 secondary antibodies at 1/10000 dilution for 1 hour at room temperature before imaging.

    • All lanes : Anti-Oct4 antibody [EPR2054] (ab109183) at 1/1000 dilution

      Lane 1 : Seminoma lysate
      Lane 2 : NCCIT cell lysate
      Lane 3 : HeLa cell lysate

      Lysates/proteins at 10 µg per lane.

      Predicted band size : 39 kDa
    • ab109183, at 1:500 dilution, staining Oct4 in paraffin-embedded Human ovarian dysgerminoma by Immunohistochemistry.

    • Flow Cytometry analysis of HeLa (human cervix adenocarcinoma) cells labelling Oct4 with ab109183 at 1/60 (red). Cells were fixed with 4% paraformaldehyde and permeabilised with 90% methanol. An Alexa Fluor® 488-conjugated goat anti-rabbit IgG (1/2000) was used as the secondary antibody. Black - Isotype control, rabbit monoclonal IgG. Blue - Unlabelled control, cells without incubation with primary and secondary antibodies.

    • ab109183 at 1/50 immunoprecipitating Oct4 in NCCIT (human pluripotent embryonal carcinoma) whole cell lysate observed at 39 KDa (lanes 1 and 2).

      Lane 1 (input): NCCIT whole cell lysate, 10μg

      Lane 2 (+): ab109183 + NCCIT whole cell lysate

      Lane 3 (-): Rabbit monoclonal IgG (ab172730) instead of ab109183 in NCCIT whole cell lysate

      For western blotting, ab109183 at 1/1000 dilution and ab131366 VeriBlot for IP (HRP) was used as the secondary antibody at 1/10000.

      Blocking buffer and concentration: 5% NFDM/TBST.
      Diluting buffer and concentration: 5% NFDM /TBST.



    • Flow cytometry analysis of NCCIT (human pluripotent embryonal carcinoma cells labelling Oct4 (pink) with ab109183 at dilution of 1/100. The secondary antibody used was goat anti rabbit IgG (FITC) at dilution of 1/150. Cells were fixed with 2% paraformaldehyde. Isotype control antibody used was rabbit monoclonal IgG (green).

    • ab109183 showing negative staining in Colonic adenocarcinoma tissue.

    • ab109183 showing negative staining in Skeletal muscle tissue.

    • ab109183 showing negative staining in Normal liver tissue.

    • ab109183 showing positive staining in Seminoma tissue.

    • ab109183 showing negative staining in Normal brain tissue.

    • ab109183 showing positive staining in Fetal brain tissue.

    • ab109183 showing negative staining in Hepatocellular carcinoma tissue.

    • ab109183 showing positive staining in Embryonal carcinoma tissue.

    • Equilibrium disassociation constant (KD)
      Learn more about KD

      Click here to learn more about KD

    References for Anti-Oct4 antibody [EPR2054] (ab109183)

    This product has been referenced in:
    • Wang L  et al. Pseudogene OCT4-pg4 functions as a natural micro RNA sponge to regulate OCT4 expression by competing for miR-145 in hepatocellular carcinoma. Carcinogenesis 34:1773-81 (2013). Human . Read more (PubMed: 23615404) »
    • Wu CP  et al. Identification of cancer stem-like side population cells in purified primary cultured human laryngeal squamous cell carcinoma epithelia. PLoS One 8:e65750 (2013). WB ; Human . Read more (PubMed: 23776540) »

    See all 3 Publications for this product

    Product Wall

    Application Western blot
    Sample Human Purified protein (brain cancer)
    Gel Running Conditions Reduced Denaturing
    Loading amount 20 µg
    Specification brain cancer
    Blocking step Milk as blocking agent for 30 minute(s) · Concentration: 5% · Temperature: 26°C

    Abcam user community

    Verified customer

    Submitted Apr 24 2015

    Thank you for your enquiry and your interest.

    I can confirm that two isoforms of Oct 4 have been identified, and the exact amino acid sequences (aa) can be found at this website: http://www.uniprot.org/uniprot/Q01860

    - Isoform A: Q0...

    Read More

    Muchas gracias por tu respuesta.

    Es importante que todos los anticuerpos que escojas para llevar a cabo IHC-P en tejido humano estén validados (y por tanto garantizados por Abcam) para funcionar en esta especie y aplicación. Est...

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    Thank you for contacting Abcam. Regarding ab74538, when stored properly at -20, the antibody is expected to be stable for up to 5 years from receipt. I hope this information is helpful. Please do not hesitate to contact us if you have any additional qu...

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    Thank you for contacting Abcam regarding ab109183. I am sorry to hear that you have been experiencing difficulties with this antibody. Can you please provide some additional details as to the nature of the problems you are experiencing and your protoco...

    Read More

    Thank you for contacting Abcam about this. I have changed the datasheet to remedy the error that you have noticed. Ab109183 Anti-Oct4 antibody [EPR2054] is a rabbit IgG isotype. When using in Western Blot I would recommend using one of the followin...

    Read More