Overview

  • Product nameHuman alpha 1 Antitrypsin ELISA Kit (SERPINA1)
    See all alpha 1 Antitrypsin kits
  • Detection methodColorimetric
  • Precision
    Intra-assay
    Sample n Mean SD CV%
    Overall 4.9%
    Inter-assay
    Sample n Mean SD CV%
    Overall 7%
  • Tests
    1 x 96 well plate
  • Sample type
    Cell culture supernatant, Saliva, Milk, Urine, Serum, Cell culture media, Lithium Heparin Plasma, Cerebral Spinal Fluid
  • Assay typeSandwich (quantitative)
  • Sensitivity
    = 0.35 ng/ml
  • Range
    0.391 ng/ml - 100 ng/ml
  • Recovery

    98 %

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

    Abcam’s alpha 1 Antitrypsin (SERPINA1) Human in vitro ELISA (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of alpha 1 Antitrypsin in urine, milk, saliva, CSF and cell culture supernatants.

    An alpha 1 antitrypsin specific antibody has been precoated onto 96-well plates and blocked. Standards or test samples are added to the wells and subsequently an alpha 1 antitrypsin specific biotinylated detection antibody is added and then followed by washing with wash buffer. Avidin-Biotin-Peroxidase Complex is added and unbound conjugates are washed away with wash buffer. TMB is then used to visualize HRP enzymatic reaction. TMB is catalyzed by HRP 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 1 antitrypsin captured in plate.

     

  • Tested applicationsSuitable for: Sandwich ELISAmore details
  • PlatformMicroplate

Properties

  • FunctionInhibitor of serine proteases. Its primary target is elastase, but it also has a moderate affinity for plasmin and thrombin. Irreversibly inhibits trypsin, chymotrypsin and plasminogen activator. The aberrant form inhibits insulin-induced NO synthesis in platelets, decreases coagulation time and has proteolytic activity against insulin and plasmin.
    Short peptide from AAT: reversible chymotrypsin inhibitor. It also inhibits elastase, but not trypsin. Its major physiological function is the protection of the lower respiratory tract against proteolytic destruction by human leukocyte elastase (HLE).
  • Tissue specificityUbiquitous. Expressed in leukocytes and plasma.
  • Involvement in diseaseAlpha-1-antitrypsin deficiency
  • Sequence similaritiesBelongs to the serpin family.
  • DomainThe reactive center loop (RCL) extends out from the body of the protein and directs binding to the target protease. The protease cleaves the serpin at the reactive site within the RCL, establishing a covalent linkage between the carboxyl group of the serpin reactive site and the serine hydroxyl of the protease. The resulting inactive serpin-protease complex is highly stable.
  • Post-translational
    modifications
    N-glycosylated. Differential glycosylation produces a number of isoforms. N-linked glycan at Asn-107 is alternatively di-antennary, tri-antennary or tetra-antennary. The glycan at Asn-70 is di-antennary with trace amounts of tri-antennary. Glycan at Asn-271 is exclusively di-antennary. Structure of glycans at Asn-70 and Asn-271 is Hex5HexNAc4. The structure of the antennae is Neu5Ac(alpha1-6)Gal(beta1-4)GlcNAc attached to the core structure Man(alpha1-6)[Man(alpha1-3)]Man(beta1-4)GlcNAc(beta1-4)GlcNAc. Some antennae are fucosylated, which forms a Lewis-X determinant.
    Proteolytic processing may yield the truncated form that ranges from Asp-30 to Lys-418.
  • Cellular localizationSecreted. Endoplasmic reticulum. The S and Z allele are not secreted effectively and accumulate intracellularly in the endoplasmic reticulum and Secreted, extracellular space, extracellular matrix.
  • Information by UniProt
  • Alternative names
    • A1A
    • A1AT
    • A1AT_HUMAN
    • AAT
    • Alpha 1 antiproteinase
    • Alpha 1 antitrypsin
    • Alpha 1 antitrypsin null
    • Alpha 1 protease inhibitor
    • Alpha-1 protease inhibitor
    • Alpha-1-antiproteinase
    • alpha1 proteinase inhibitor
    • Alpha1AT
    • Dom1
    • PI
    • PI1
    • PRO2275
    • Serine (or cysteine) proteinase inhibitor clade A member 1
    • Serine protease inhibitor 1-1
    • Serine protease inhibitor A1a
    • Serpin A1
    • Serpin A1a
    • Serpin peptidase inhibitor clade A member 1
    • Serpina1
    • Short peptide from AAT
    • SPAAT
    • Spi1-1
    see all
  • Database links

Applications

Our Abpromise guarantee covers the use of ab108799 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 1 Antitrypsin ELISA Kit (SERPINA1) images

  • Linearity: alpha 1 antitrypsin in urine at different diutions, corrected for the factor of dilution (duplicates +/- SD).

  • Linearity: alpha 1 antitrypsin in human milk at different diutions, corrected for the factor of dilution (duplicates +/- SD)

  • Linearity: alpha 1 antitrypsin in serum and plasma (Li-heparine) at different diutions, corrected for the factor of dilution (duplicates +/- SD)

  • Alpha 1 antitrypsin in human biological fluids (duplicates +/- SD).

    The samples were tested in different ranges of dilutions (serum and Li-heparine plasma: 2e3-1e6; CSF: 5e3-5e4; milk: 1e2-1e3; saliva: 2e2-2e3).

  • Standard curve with background signal subtracted (duplicates; +/- SD).

  • Representative Standard Curve using ab108799

Protocols

References for Human alpha 1 Antitrypsin ELISA Kit (SERPINA1) (ab108799)

This product has been referenced in:
  • Rosser CJ  et al. Urinary protein biomarker panel for the detection of recurrent bladder cancer. Cancer Epidemiol Biomarkers Prev 23:1340-5 (2014). Sandwich ELISA ; Human . Read more (PubMed: 24714076) »
  • Miyake M  et al. Investigation of CCL18 and A1AT as potential urinary biomarkers for bladder cancer detection. BMC Urol 13:42 (2013). Sandwich ELISA ; Human . Read more (PubMed: 24011266) »

See all 3 Publications for this product

Product Wall

Thank you for contacting us.




ab108798 is for plasma and serum samples.

ab108799 is for urine, milk, saliva and cell culture samples

Unfortunately, neither of them has cross-reactivity with mouse
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Thank you for contacting us.

You can use ab108799 for serum, you will just have to optimize the dilutions to get on the standard curve. Our serum samples were at 6000X.


I hope this information is helpful to you. Please do no...

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Thank you for your message.

I can confirm that all three of the Alpha 1 anti trypsin proteins in our catalog are from human, and are full length. Therefore, theoretically, they could be detected by the antibodies in the kit and be used for y...

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Thank you for contacting Abcam and I do apologize for the long delay in providing you with this information.

The standard is a purified protein from human source. The assay should work for cell culture over express alpha1 antitripsin. Both na...

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Thank you for contacting us. The standard provided should only be 100 ng/ml after reconstitution. At that concentration, the recommended curve is a 1:4 dilution providing points: 25, 6.25, 1.56, and 0.391 ng/ml. Concentrations above 100 ng/ml are dange...

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Thank you very much for your reply.

We haven't done any studies to determine the heterogeneity of the detection antibody reagent and I don't know of amethod to really predict that accurately as it's quite complex, but Iassumethere would be ba...

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Thank you very much for your reply.

Since the kits haven't been tested with non-glycosylated forms of alpha 1 antitrypsin, we don't have any data in this regard and can't say for sure. Since the antibodies used in the kit are polyclonal and r...

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Thank you very much for your call earlier this month and for your patience while I have been working with the lab to get this information for you. I sincerely apologize for the extended delay.

The standard is a native protein isolated from hu...

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Thank you for contacting us.

Unfortunately we have not tested this kit with Plasma samples however keeping in mind the recommended sample type, it is more likely that this kit will be suitable for plasma samples also.

As we have not ...

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