• Product name

    Human Prekallikrein 1B ELISA Kit
  • Detection method

  • Precision

    Sample n Mean SD CV%
    overall 5 6.3%
    Sample n Mean SD CV%
    overall 3 5.8%
  • Sample type

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

    Sandwich (quantitative)
  • Sensitivity

    154 pg/ml
  • Range

    0.47 ng/ml - 30 ng/ml
  • Recovery

    Sample specific recovery
    Sample type Average % Range
    Cell culture supernatant 94 87% - 101%
    Milk 85 82% - 91%
    Serum 92 84% - 98%
    Heparin Plasma 91 87% - 97%
    EDTA Plasma 101 88% - 107%
    Citrate Plasma 92 87% - 95%

  • Assay time

    1h 30m
  • Assay duration

    One step assay
  • Species reactivity

    Reacts with: Human
    Does not react with: Mouse, Rat, Sheep, Rabbit, Goat, Guinea pig, Cow, Dog, Pig
  • Product overview

    Prekallikrein 1B in vitro CatchPoint SimpleStep ELISA (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of Prekallikrein and Plasma Kallikrein 1B protein in human serum, plasma, milk, and cell culture supernatant.

    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

    Prekallikrein 1B (KLKB1) is a 88 kDa serine protease involved in blood coagulation, kinin generation, fibrinolysis and inflammation. Mature KLKB1 primarily circulates as a complex with high-molecular weight kinnogen, where it releases kinins from kininogens during the inflammation and vasodilation response.

    This kit detects both prekallikrein and plasma kallikrein.

  • Tested applications

    Suitable for: Sandwich ELISAmore details
  • Platform

    Pre-coated microplate (12 x 8 well strips)


  • Storage instructions

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

Associated products


Our Abpromise guarantee covers the use of ab202405 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.

  • Serum from 10 healthy male donors was measured in duplicate. The mean Plasma Kallikrein 1B concentration was determined to be 112.6 µg/mL with a range of 80.8 – 206.4 µg/mL in male donors.



ab202405 has not yet been referenced specifically in any publications.

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