• Product nameAnti-TFPI antibody
    See all TFPI primary antibodies
  • Description
    Goat polyclonal to TFPI
  • Tested applicationsSuitable for: WB, Electron Microscopymore details
  • Species reactivity
    Reacts with: Human
    Predicted to work with: Rhesus monkey
  • Immunogen

    Synthetic peptide: VKIAYEEIFVKNM, corresponding to C terminal amino acids 292-304 of Human TFPI.

  • Positive control
    • HeLa lysate
  • General notesPrincipal Names - TFPI: tissue factor pathway inhibitor; Lipoprotein-associated coagulation inhibitor; LACI Official Gene Symbol - TFPI GenBank Accession Number – NP_006278 LocusLink ID - 7035

    A protease inhibitor that inhibits fibrin clot formation.


  • FormLiquid
  • Storage instructionsShipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.
  • Storage bufferPreservative: 0.02% Sodium Azide
    Constituents: 0.5% BSA, Tris buffered saline, pH 7.3
  • Concentration information loading...
  • PurityIgG fraction
  • Purification notesPurified from goat serum by ammonium sulphate precipitation followed by antigen affinity chromatography using the immunizing peptide.
  • Primary antibody notesA protease inhibitor that inhibits fibrin clot formation.
  • ClonalityPolyclonal
  • IsotypeIgG
  • Research areas


Our Abpromise guarantee covers the use of ab9881 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 a concentration of 0.3 - 1 µg/ml. Can be blocked with Human TFPI peptide (ab23168).
Electron Microscopy Use at an assay dependent dilution. PubMed: 20592020


  • FunctionInhibits factor X (X(a)) directly and, in a Xa-dependent way, inhibits VIIa/tissue factor activity, presumably by forming a quaternary Xa/LACI/VIIa/TF complex. It possesses an antithrombotic action and also the ability to associate with lipoproteins in plasma.
  • Tissue specificityMostly in endothelial cells.
  • Sequence similaritiesContains 3 BPTI/Kunitz inhibitor domains.
  • DomainThis inhibitor contains three inhibitory domains. The first domain interacts with VIIa and TF, the second one with Xa.
  • Post-translational
  • Cellular localizationSecreted.
  • Information by UniProt
  • Database links
  • Alternative names
    • Anti convertin antibody
    • EPI antibody
    • Extrinsic pathway inhibitor antibody
    • LACI antibody
    • Lipoprotein associated coagulation inhibitor antibody
    • Lipoprotein-associated coagulation inhibitor antibody
    • TFI antibody
    • TFPI 1 antibody
    • TFPI antibody
    • TFPI1 antibody
    • TFPI1_HUMAN antibody
    • Tissue factor pathway inhibitor (lipoprotein associated coagulation inhibitor) antibody
    • Tissue factor pathway inhibitor antibody
    see all

References for Anti-TFPI antibody (ab9881)

This product has been referenced in:
  • Papareddy P  et al. C-terminal Peptides of Tissue Factor Pathway Inhibitor Are Novel Host Defense Molecules. J Biol Chem 285:28387-98 (2010). Electron Microscopy . Read more (PubMed: 20592020) »

See 1 Publication for this product

Product Wall

Thank you for your reply.
Thank you for trying some of the tips. Please do let me know what the results are once you have them. I'm curious myself, as well as want to ensure the antibodies are working as expected.

Should it turn out that...

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Thank you for your reply and the additional information.

I have a couple more questions as well as a few suggestions. I hope you don't mind.

1) Is the rTFPI that you were showing on the left hand side glycosylated or not?
2) ...

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Thank you for contacting us.

Antibody ab9881, detects only the alpha isoform.
Antibody ab66544, would detect both isoforms if they are present
For antibody ab48648, we do not know where the epitope is, thus we cannot predict if eit...

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Thank you for your enquiry. You can use reducing Western blotting conditions (if non-reducing conditions are required, we would state this information on the online datasheet). We would recommend blocking with either 5% w/v nonfat dry milk or 5% w/v BS...

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Thank you for your enquiry. To our knowledge, this antibody has yet to be tested in FACS. All tested applications are specified on Abcam product datasheets. If you decide to go ahead and purchase this product, please let us know how you get on and in r...

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This is a new antibody that has only yet been tested on human.