• Product name
    Human alpha 2 Macroglobulin ELISA Kit
    See all alpha 2 Macroglobulin kits
  • Detection method
  • Precision
    Sample n Mean SD CV%
    Overall 4.4%
    Sample n Mean SD CV%
    Overall 8.1%
  • Sample type
    Cell culture supernatant, Saliva, Milk
  • Assay type
    Sandwich (quantitative)
  • Sensitivity
    = 2 ng/ml
  • Range
    0.002 µg/ml - 0.5 µg/ml
  • Recovery

    98 %

  • Assay time
    4h 00m
  • Assay duration
    Multiple steps standard assay
  • Species reactivity
    Reacts with: Human
  • Product overview

    Abcam’s alpha 2 Macroglobulin Human in vitro ELISA (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of alpha 2 Macroglobulin in saliva, milk, cerebrospinal fluid and cell culture supernatants.

    An alpha 2 Macroglobulin specific antibody has been precoated onto 96-well plates and blocked. Standards or test samples are added to the wells and subsequently an alpha 2 Macroglobulin specific biotinylated detection antibody is added and then followed by washing with wash buffer. Streptavidin-Peroxidase Conjugate is added and unbound conjugates are washed away with wash buffer. TMB is then used to visualize Streptavidin-Peroxidase enzymatic reaction. TMB is catalyzed by Streptavidin-Peroxidase to produce a blue color product that changes into yellow after adding acidic stop solution. The density of yellow coloration is directly proportional to the amount of alpha 2 Macroglobulin captured in plate.

  • Tested applications
    Suitable for: Sandwich ELISAmore details
  • Platform


  • Function
    Is able to inhibit all four classes of proteinases by a unique 'trapping' mechanism. This protein has a peptide stretch, called the 'bait region' which contains specific cleavage sites for different proteinases. When a proteinase cleaves the bait region, a conformational change is induced in the protein which traps the proteinase. The entrapped enzyme remains active against low molecular weight substrates (activity against high molecular weight substrates is greatly reduced). Following cleavage in the bait region a thioester bond is hydrolyzed and mediates the covalent binding of the protein to the proteinase.
  • Tissue specificity
    Secreted in plasma.
  • Sequence similarities
    Belongs to the protease inhibitor I39 (alpha-2-macroglobulin) family.
  • Developmental stage
    Contrary to the rat protein, which is an acute phase protein, this protein is always present at high levels in circulation.
  • Cellular localization
  • Information by UniProt
  • Alternative names
    • A2m
    • A2MG_HUMAN
    • Alpha 2 M
    • Alpha 2M
    • Alpha-2-M
    • Alpha-2-macroglobulin
    • C3 and PZP-like alpha-2-macroglobulin domain-containing protein 5
    • CPAMD5
    • DKFZp779B086
    • FWP007
    • S863 7
    see all
  • Database links


Our Abpromise guarantee covers the use of ab108883 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.

Human alpha 2 Macroglobulin ELISA Kit images

  • Representative Standard Curve using ab108883.


References for Human alpha 2 Macroglobulin ELISA Kit (ab108883)

This product has been referenced in:
  • Sturtzel C  et al. The transcription factor MEF2C negatively controls angiogenic sprouting of endothelial cells depending on oxygen. PLoS One 9:e101521 (2014). Read more (PubMed: 24988463) »

See 1 Publication for this product

Product Wall

Unfortunately, I can confirm that the antibodies used in these kits have been raised against recombinant protein and purified proteins. The exact epitope of the antibodies have not been investigated further. We are therefore not able to provi...

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Abreview for alpha 2 Macroglobulin Human ELISA Kit

Excellent Excellent 5/5 (Ease of Use)

Sample: Human Cell (HepG2)
Specification: HepG2
Amount of Sample: 0.125ug standard µg
Type of Kit Used: ELISA
Positive control: Provided alpha 2 Macroglobulin standard
Did you use the Abcam Kit protocol?: Yes

Additional data
Additional Notes: Recognized human A2M. Did not recognize bovine A2M in FBS.

Abcam user community

Verified customer

Submitted Jul 03 2012

Thank you for your inquiry. ab108884 is an alpha 1 microglobulin human ELISA kit, Swiss Prot P02760. Alpha1-microglobulin (1M), also called protein HC, is a tubular plasma and tissue protein that belongs to the lipocalin transport protein superfami...

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