• Product name
  • Description
    Rabbit polyclonal to PF4
  • Host species
  • Tested applications
    Suitable for: WB, ELISA, Neutralising, IHC-P, Sandwich ELISAmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Highly pure (>98%) recombinant hPF-4 (human Platelet Factor-4)

  • Positive control
    • Recombinant human PF4 protein (ab9562) can be used as a positive control in WB.



Our Abpromise guarantee covers the use of ab9561 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 Use at an assay dependent concentration. Detects a band of approximately 11 kDa (predicted molecular weight: 11 kDa). To detect hPF-4 by Western Blot analysis this antibody can be used at a concentration of 0.1 - 0.2 µg/ml. Used in conjunction with compatible secondary reagents the detection limit for recombinant hPF-4 is 1.5 - 3.0 ng/lane, under either reducing or non-reducing conditions.
ELISA Use at an assay dependent concentration. To detect hPF-4 by direct ELISA (using 100µl/well antibody solution) a concentration of at least 0.5µg/ml of this antibody is required. This antigen affinity purified antibody, in conjunction with compatible secondary reagents, allows the detection of 0.2 - 0.4 ng/well of recombinant hPF-4.
Neutralising Use at an assay dependent concentration. To yield one-half maximal inhibition [ND50] of the biological activity of hPF-4 (50 ng/ml), a concentration of 1.75 - 3.0 µg/ml of this antibody is required.
IHC-P 1/100.
Sandwich ELISA Use at an assay dependent concentration. Can be paired for Sandwich ELISA with Rabbit polyclonal to PF4 (Biotin) (ab83123).

Can be paired for Sandwich ELISA with ab83123


  • Function
    Released during platelet aggregation. Neutralizes the anticoagulant effect of heparin because it binds more strongly to heparin than to the chondroitin-4-sulfate chains of the carrier molecule. Chemotactic for neutrophils and monocytes. Inhibits endothelial cell proliferation, the short form is a more potent inhibitor than the longer form.
  • Sequence similarities
    Belongs to the intercrine alpha (chemokine CxC) family.
  • Post-translational
    Binds non-covalently to a proteoglycan molecule.
  • Cellular localization
  • Information by UniProt
  • Database links
  • Alternative names
    • C-X-C motif chemokine 4 antibody
    • Chemokine (C X C motif) ligand 4 antibody
    • Chemokine (CXC motif) ligand 4 antibody
    • CXCL 4 antibody
    • CXCL4 antibody
    • Iroplact antibody
    • MGC138298 antibody
    • Oncostatin A antibody
    • Oncostatin-A antibody
    • OncostatinA antibody
    • PF 4 antibody
    • PF-4 antibody
    • PF4 antibody
    • Platelet factor 4 antibody
    • PLF4_HUMAN antibody
    • SCYB 4 antibody
    • SCYB4 antibody
    • short form antibody
    • Small inducible cytokine subfamily member 4 antibody
    see all


  • Anti-PF4 antibody (ab9561) at 1 µg/ml + Human Platelet (Human adult normal cell line) Whole Cell Lysate at 10 µg

    Goat Anti-Rabbit IgG H&L (HRP) preadsorbed (ab97080) at 1/5000 dilution

    Developed using the ECL technique.

    Performed under reducing conditions.

    Predicted band size: 11 kDa
    Observed band size: 11 kDa
    Additional bands at: 18 kDa, 30 kDa, 37 kDa. We are unsure as to the identity of these extra bands.

    Exposure time: 2 minutes


This product has been referenced in:
  • Maybin JA  et al. Steroids Regulate CXCL4 in the Human Endometrium During Menstruation to Enable Efficient Endometrial Repair. J Clin Endocrinol Metab 102:1851-1860 (2017). Read more (PubMed: 28323919) »
  • Izumi M  et al. Reduced induction of anti-PF4/heparin antibody in RA patients after total knee arthroplasty. Arthritis Res Ther 18:191 (2016). Human . Read more (PubMed: 27558507) »
See all 6 Publications for this product

Customer reviews and Q&As

1-2 of 2 Abreviews or Q&A


Thank you for contacting us.

Ab9561 has been used in neutralizing assays and has been published byLambert MPet al.Platelet factor 4 is a negative autocrine in vivo regulator of megakaryopoiesis: clinical and therapeutic implications.Blood110:1153-60 (2007).PMID:17495129

To yield one-half maximal inhibition [ND50] of the biological activity of hPF-4 (50 ng/ml), a concentration of 1.75 - 3.0 µg/ml of this antibody is required. The exact conditions needed for you however will need to be determined experimentally.

We currently offer this product at 100ul for $424.00 and do not have special arrangement with the University of British Columbia. You may order directly by clicking the "Add To Basket" button on the web page, by calling our customer service specialists at 1-888-772-2226 or by fax at 1-866-739-9884.

We also offer an active hPF4, ab80477 (https://www.abcam.com/PF4-protein-Active-ab80477.html). This product is available in a 100ug size for $424.00.

These products are covered by our Abpromise guarantee. If you experience any troubles using these products in the manner described on our datasheet and the product has been purchased within the last six months, we offer scientific support, replacement or refund under our Abpromise guarantee. More information about our Abpromise may be found at the following link:


I hope that this information is helpful. Please let me know if you have any questions or there are other ways that Abcam may help you meet your research goals.

Read More
Western blot
Mouse Tissue lysate - other (Platelet lysate)
Loading amount
50 µg
Platelet lysate
Gel Running Conditions
Reduced Denaturing (4-15% Tris Hcl gel)
Blocking step
BSA as blocking agent for 30 minute(s) · Concentration: 5% · Temperature: 25°C

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Submitted Aug 02 2011


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