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Von Willebrand Factor Human ELISA Kit (ab108918)

Overview

  • Product nameVon Willebrand Factor Human ELISA KitSee all Von Willebrand Factor kits ...
  • Tests
    1 x 96 well plate
  • Sample type
    Cell culture supernatant, Serum, Plasma
  • Assay typeSandwich
  • Sensitivity
    = 2.5 mU/ml
  • Range
    2.5 mU/ml - 80 mU/ml
  • Recovery

    100.5 %

  • Assay time
    5h 00m
  • Species reactivity
    Reacts with: Human
  • Product overview

    Abcam’s Von Willebrand Factor (VWF) Human ELISA (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of Human VWF in serum, plasma and cell culture supernatants.

    Ab108918 VWF ELISA kit is designed for detection of human VWF in plasma, serum and cell culture supernatants. This assay employs a quantitative sandwich enzyme immunoassay technique that measures VWF in less than 5 hours. A murine antibody specific for VWF has been pre-coated onto a microplate. Human VWF in standards and samples is sandwiched by the immobilized monoclonal antibody and biotinylated polyclonal antibody specific for VWF, which is recognized by a streptavidin-peroxidase conjugate. All unbound material is then washed away and a peroxidase enzyme substrate is added. The color development is stopped and the intensity of the color is measured.

  • Notes

    Von Willebrand factor (VWF) is a multimeric glycoprotein that circulates in blood forming a noncovalent complex with procoagulant factor VIII. During normal homeostasis, the larger multimers of VWF are responsible for facilitating platelet plug formation by forming a bridge between platelet glycoprotein IB and exposed collagen in the subendothelium. The congenital dysfunctional state of VWF causes a moderate to severe bleeding diathesis-von Willebrand disease (VWD).

  • Tested applicationsSandwich ELISA more details

Properties

  • FunctionImportant in the maintenance of hemostasis, it promotes adhesion of platelets to the sites of vascular injury by forming a molecular bridge between sub-endothelial collagen matrix and platelet-surface receptor complex GPIb-IX-V. Also acts as a chaperone for coagulation factor VIII, delivering it to the site of injury, stabilizing its heterodimeric structure and protecting it from premature clearance from plasma.
  • Tissue specificityPlasma.
  • Involvement in diseaseDefects in VWF are the cause of von Willebrand disease type 1 (VWD1) [MIM:193400]. A common hemorrhagic disorder due to defects in von Willebrand factor protein and resulting in impaired platelet aggregation. Von Willebrand disease type 1 is characterized by partial quantitative deficiency of circulating von Willebrand factor, that is otherwise structurally and functionally normal. Clinical manifestations are mucocutaneous bleeding, such as epistaxis and menorrhagia, and prolonged bleeding after surgery or trauma.
    Defects in VWF are the cause of von Willebrand disease type 2 (VWD2) [MIM:613554]. A hemorrhagic disorder due to defects in von Willebrand factor protein and resulting in impaired platelet aggregation. Von Willebrand disease type 2 is characterized by qualitative deficiency and functional anomalies of von Willebrand factor. It is divided in different subtypes including 2A, 2B, 2M and 2N (Normandy variant). The mutant VWF protein in types 2A, 2B and 2M are defective in their platelet-dependent function, whereas the mutant protein in type 2N is defective in its ability to bind factor VIII. Clinical manifestations are mucocutaneous bleeding, such as epistaxis and menorrhagia, and prolonged bleeding after surgery or trauma.
    Defects in VWF are the cause of von Willebrand disease type 3 (VWD3) [MIM:277480]. A severe hemorrhagic disorder due to a total or near total absence of von Willebrand factor in the plasma and cellular compartments, also leading to a profound deficiency of plasmatic factor VIII. Bleeding usually starts in infancy and can include epistaxis, recurrent mucocutaneous bleeding, excessive bleeding after minor trauma, and hemarthroses.
  • Sequence similaritiesContains 1 CTCK (C-terminal cystine knot-like) domain.
    Contains 4 TIL (trypsin inhibitory-like) domains.
    Contains 3 VWFA domains.
    Contains 3 VWFC domains.
    Contains 4 VWFD domains.
  • DomainThe von Willebrand antigen 2 is required for multimerization of vWF and for its targeting to storage granules.
  • Post-translational
    modifications
    All cysteine residues are involved in intrachain or interchain disulfide bonds.
    N- and O-glycosylated.
  • Cellular localizationSecreted. Secreted > extracellular space > extracellular matrix. Localized to storage granules.
  • Target information above from: UniProt accession P04275 The UniProt Consortium
    The Universal Protein Resource (UniProt) in 2010
    Nucleic Acids Res. 38:D142-D148 (2010) .

    Information by UniProt
    • Alternative names
        Coagulation factor VIIIcoagulation factor VIII VWFF8VWF
        F8VWFFactor VIII related antigenFACTOR VIII-VON WILLEBRAND FACTORvon Willebrand antigen 2Von Willebrand antigen IIVon Willebrand diseasevon Willebrand factorVWDVWDVWFVWF_HUMAN
      see all
  • Database links
  • Applications

    Our Abpromise guarantee covers the use of ab108918 in the following tested applications.

    The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

    Application Notes
    Sandwich ELISA sELISA

    Von Willebrand Factor Human ELISA Kit images

    • TYPICAL STANDARD CURVE – Data provided for demonstration purposes only. A new standard curve must be generated for each assay performed.

    Protocols

    References for Von Willebrand Factor Human ELISA Kit (ab108918)

    ab108918 has not yet been referenced specifically in any publications.

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    Thank you for contacting us and making us aware of the typo in our protocol.

    The corrected text on pg.8 of protocol last sentence of 3. Standard Curve which used to read: Diluent serves as the zero standard (0 µg/ml), now reads: “Diluent serves ...

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    Merci beaucoup pour votre émail et votre retour. Nous sommes très heureux de savoir que le problème s'est donc expliqué et résolu.

    J'espère que vous avez bien reçu le kit complémentaire hie...

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    Merci de votre patience.

    Voici les réponses à vos questions:

    Le laboratoire à confirmé que c'est normal de voir des cristaux aussi dans le tampon du diluant. S'il y à des cristaux dans le tampon, nou...

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    Merci beaucoup pour votre émail.

    Nous allons vous envoyer le kit lundi, vous devriez le recevoir donc mardi de la semaine prochaine. Veuillez s'il vous plaît nous tenir aussi au courant, sile problème est complètementr...

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    Merci pour votre émail et votre patience.

    Je peux vous confirmer qu'il s'agit d'une erreur d'annotation. Effectivement, les standards que vous avez reçu dans le kit lot GR79395 ne sont pas à 50mU, mais à 160mU.
    <...

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    Merci beaucoup pour votre émail.
    Je suis très désolée de ce problème que vous avez rencontré avec le standard du nouveau lot. Je peux vous assurer que nous prenons ceci très aux sérieux. Je suis en train d'investiguer ce problème et j'ai contacté le ...

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    Thank you for your inquiry.

    The kit use purified vWF from plasma as standard. The standard has some factor VIII, but not a significant amount.

    Please note that when you receive this kit, the concentration of the standard will be on t...

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    Comme mon collègue Dr Boucher est absent aujourd'hui, je vous fait parvenir la réponse du laboratoire.
    Les unités utilisés dans ce kit sont par rapport a une unité de référence interne, qui avait été utilisé comme contrôle. Pour l'instant, cet unité ...

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    Merci de nous avoir contactés.

    Nous sommes désolés d'apprendre que le produit que vous avez reçu ne fonctionne pas comme attendu. Je me permets de vous transférer le numéro de commande de remplacement g...

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    Thank you for your telephone enquiry this morning.

    As discussed, we have 6 of these kits in stock at the moment, from 2 different lot numbers. I am forwarding this to our bulk orders team who will be able to let you know:

    1. If we ca...

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    Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"