Overview

  • Product name

    Human Factor XII ELISA Kit
    See all Factor XII kits
  • Detection method

    Colorimetric
  • Precision

    Intra-assay
    Sample n Mean SD CV%
    Factor XII 8 2.1%
    Inter-assay
    Sample n Mean SD CV%
    Factor XII 3 2%
  • Sample type

    Cell culture supernatant, Serum, Heparin Plasma, EDTA Plasma, Citrate Plasma
  • Assay type

    Sandwich (quantitative)
  • Sensitivity

    0.7 ng/ml
  • Range

    0.94 ng/ml - 60 ng/ml
  • Recovery

    Sample specific recovery
    Sample type Average % Range
    Serum 105 97% - 110%
    Cell culture media 94 90% - 97%
    Heparin Plasma 105 99% - 108%
    EDTA Plasma 104 101% - 105%
    Citrate Plasma 104 94% - 108%

  • Assay time

    1h 30m
  • Assay duration

    One step assay
  • Species reactivity

    Reacts with: Human
  • Product overview

    Factor XII in vitro SimpleStep ELISA® (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of Factor XII protein in human serum, plasma and cell culture supernatant samples.


    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 affectsimmunoaffinity 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

    Factor XII is a 80 kDa plasma serine protease involved in the coagulation cascade. Factor XII is activated by proteolysis and the product, Factor XIIa, goes on to activate Factor XI and prekallikrein in in vitro models of blood cogulation. Its involvement in the beginning of the coagulation cascade is only seen in in vitro studies, and is thought to have no effect on coagulation initiation in vivo. While Factor XII deficiency in humans is asymptomatic, Factor XII plays a role in later stages of clot formation. Deficiency of Factor XII affects the in vitro measurements of partial thromboplastin time in human blood, and its absence decreases the susceptibility of mice to thrombosis.

  • Tested applications

    Suitable for: Sandwich ELISAmore details
  • Platform

    Microplate

Properties

  • Storage instructions

    Store at +4°C. Please refer to protocols.
  • Components 1 x 96 tests
    10X Human Factor XII Capture Antibody 1 x 600µl
    10X Human Factor XII Detector Antibody 1 x 600µl
    10X Wash Buffer PT (ab206977) 1 x 20ml
    ab221824 - Antibody Diluent 4BI 1 x 6ml
    Human Factor XII Lyophilized Purified Protein 2 vials
    Plate Seals 1 unit
    Sample Diluent NS (ab193972) 1 x 50ml
    SimpleStep Pre-Coated 96-Well Microplate (ab206978) 1 unit
    Stop Solution 1 x 12ml
    TMB Development Solution 1 x 12ml
  • Research areas

  • Function

    Factor XII is a serum glycoprotein that participates in the initiation of blood coagulation, fibrinolysis, and the generation of bradykinin and angiotensin. Prekallikrein is cleaved by factor XII to form kallikrein, which then cleaves factor XII first to alpha-factor XIIa and then trypsin cleaves it to beta-factor XIIa. Alpha-factor XIIa activates factor XI to factor XIa.
  • Involvement in disease

    Factor XII deficiency
    Hereditary angioedema 3
  • Sequence similarities

    Belongs to the peptidase S1 family.
    Contains 2 EGF-like domains.
    Contains 1 fibronectin type-I domain.
    Contains 1 fibronectin type-II domain.
    Contains 1 kringle domain.
    Contains 1 peptidase S1 domain.
  • Post-translational
    modifications

    Factor XII is activated by kallikrein in alpha-factor XIIa, which is then further converted by trypsin into beta-factor XIIa. Alpha-factor XIIa is composed of the NH2-terminal heavy chain (Coagulation factor XIIa heavy chain) and the COOH-terminal light chain (Coagulation factor XIIa light chain), connected by a disulfide bond. Beta-factor XIIa is composed of 2 chains linked by a disulfide bond, a light chain (Beta-factor XIIa part 2), corresponding to the COOH-terminal light chain (Coagulation factor XIIa light chain) and a nonapeptide (Beta-factor XIIa part 1).
    O- and N-glycosylated. The O-linked polysaccharides were not identified, but are probably the mucin type linked to GalNAc.
  • Cellular localization

    Secreted.
  • Information by UniProt
  • Alternative names

    • Beta-factor XIIa part 1
    • Beta-factor XIIa part 2
    • Coagulation factor XII
    • Coagulation factor XIIa heavy chain
    • Coagulation factor XIIa light chain
    • F12
    • FA12_HUMAN
    • HAF
    • Hageman factor
    see all
  • Database links

Applications

Our Abpromise guarantee covers the use of ab192144 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.

Images

  • 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 = 3) are graphed.

  •  Mean Human Factor XII values fall within expected normal reference ranges (WHO).

  • Mean Human Factor XII is 21.5µg/mL and values fall within expected normal reference ranges (WHO).

Protocols

References

ab192144 has not yet been referenced specifically in any publications.

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