Key features and details
- Sensitivity: 0.95 µg/ml
- Range: 1.25 µg/ml - 40 µg/ml
- Sample type: Plasma, Serum
- Detection method: Colorimetric
- Assay type: Competitive
- Reacts with: Human
Product nameHuman alpha 2 Macroglobulin ELISA Kit
See all alpha 2 Macroglobulin kits
Intra-assay Sample n Mean SD CV% Overall 5.7% Inter-assay Sample n Mean SD CV% Overall 9.6%
Sample typeSerum, Plasma
Sensitivity= 0.95 µg/ml
Range1.25 µg/ml - 40 µg/ml
Assay time3h 00m
Assay durationMultiple steps standard assay
Species reactivityReacts with: Human
Abcam’s alpha 2 Macroglobulin Human in vitro competitive ELISA (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of alpha 2 Macroglobulin in plasma and serum.
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 biotinylated alpha 2 Macroglobulin 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 inversely proportional to the amount of alpha 2 Macroglobulin captured in plate.
The entire kit may be stored at -20°C for long term storage before reconstitution - Avoid repeated freeze-thaw cycles.
Storage instructionsStore at -20°C. Please refer to protocols.
Components 1 x 96 tests 100X Streptavidin-Peroxidase Conjugate 1 x 80µl 10X Diluent M Concentrate 1 x 30ml 20X Wash Buffer Concentrate 1 x 30ml 3X Biotinylated alpha 2 Macroglobulin (Lyophilized) 1 vial alpha 2 Macroglobulin Microplate (12 x 8 well strips) 1 unit alpha 2 Macroglobulin Standard 1 vial Chromogen Substrate 1 x 7ml Sealing Tapes 3 units Stop Solution 1 x 11ml
FunctionIs 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 specificitySecreted in plasma.
Sequence similaritiesBelongs to the protease inhibitor I39 (alpha-2-macroglobulin) family.
Developmental stageContrary to the rat protein, which is an acute phase protein, this protein is always present at high levels in circulation.
- Information by UniProt
- Alpha 2 M
ab108888 has been referenced in 5 publications.
- Gupta AK et al. Cerebrospinal Fluid Proteomics For Identification Of a2-Macroglobulin As A Potential Biomarker To Monitor Pharmacological Therapeutic Efficacy In Dopamine Dictated Disease States Of Parkinson's Disease And Schizophrenia. Neuropsychiatr Dis Treat 15:2853-2867 (2019). PubMed: 31632033
- Ghale-Noie ZN et al. High Serum Alpha-2-Macroglobulin Level in Patients with Osteonecrosis of the Femoral Head. Arch Bone Jt Surg 6:219-224 (2018). PubMed: 29911139
- Bjelosevic S et al. Quantitative Age-specific Variability of Plasma Proteins in Healthy Neonates, Children and Adults. Mol Cell Proteomics 16:924-935 (2017). PubMed: 28336724
- Robinson MD et al. Water T2as an early, global and practical biomarker for metabolic syndrome: an observational cross-sectional study. J Transl Med 15:258 (2017). PubMed: 29258604
- Sunderic M et al. Protein molecular forms of insulin-like growth factor binding protein-2 change with aging. Exp Gerontol 58C:154-158 (2014). PubMed: 25106097