• Product name

    Human PF4 ELISA Kit (CXCL4)
    See all PF4 kits
  • Detection method

  • Precision

    Sample n Mean SD CV%
    Overall 7 6.4%
    Sample n Mean SD CV%
    Overall 3 4.1%
  • Sample type

    Cell culture supernatant, Serum, Hep Plasma, EDTA Plasma, Cit plasma
  • Assay type

    Sandwich (quantitative)
  • Sensitivity

    31 pg/ml
  • Range

    0.04 ng/ml - 2.5 ng/ml
  • Recovery

    Sample specific recovery
    Sample type Average % Range
    Cell culture supernatant 90 89% - 94%
    Serum 108 105% - 109%
    Hep Plasma 110 105% - 115%
    EDTA Plasma 102 89% - 113%
    Cit plasma 114 102% - 124%

  • Assay time

    1h 30m
  • Assay duration

    One step assay
  • Species reactivity

    Reacts with: Human
    Does not react with: Goat, Cow, Pig
  • Product overview

    Human PF4 (CXCL4) SimpleStep ELISA® kit has been re-developed. We have identified new recombinant monoclonal antibodies to provide improved performance and consistency. This version will be discontinued June 2020 unless inventory is depleted beforehand.

    PF4 (CXCL4) in vitro SimpleStep ELISA® (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of Human PF4 (CXCL4) protein in serum, plasma, and cell culture supernatants.

    The SimpleStep ELISA® employs an affinity tag labeled capture antibody and a reporter conjugated detector antibody which immunocapture the sample analyte in solution. This entire complex (capture antibody/analyte/detector antibody) is in turn immobilized via immunoaffinity of an anti-tag antibody coating the well. To perform the assay, samples or standards are added to the wells, followed by the antibody mix. After incubation, the wells are washed to remove unbound material. TMB substrate is added and during incubation is catalyzed by HRP, generating blue coloration. This reaction is then stopped by addition of Stop Solution completing any color change from blue to yellow. Signal is generated proportionally to the amount of bound analyte and the intensity is measured at 450 nm. Optionally, instead of the endpoint reading, development of TMB can be recorded kinetically at 600 nm.



  • Notes

    Platelet factor-4 (PF4/CXCL4) is a 70-amino acid protein that is released from the alpha-granules of activated platelets whose major physiologic role appears to be inhibiting local antithrombin III activity and promoting coagulation. PF4 (CXCL4) has a role in inflammation and wound repair by acting as a strong chemoattractant for neutrophils, monocytes, and fibroblasts.

  • Tested applications

    Suitable for: Sandwich ELISAmore details
  • Platform




Our Abpromise guarantee covers the use of ab189573 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
Sandwich ELISA Use at an assay dependent concentration.


  • SimpleStep ELISA technology allows the formation of the antibody-antigen complex in one single step, reducing assay time to 90 minutes. Add samples or standards and antibody mix to wells all at once, incubate, wash, and add your final substrate. See protocol for a detailed step-by-step guide.


  • Background-subtracted data values (mean +/- SD) are graphed.

  • Background-subtracted data values (mean +/- SD, n = 2) are graphed.

  • Interpolated values of PF4 are plotted for the indicated sample type multiplied by the dilution factor.



This product has been referenced in:

  • Thomas KA  et al. Effect of leukoreduction and pathogen reduction on the hemostatic function of whole blood. Transfusion 59:1539-1548 (2019). Read more (PubMed: 30980757) »
See 1 Publication for this product

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