Human Pappalysin-1/PAPP-A Quantikine ELISA Kit

  (3 citations)     
Datasheet / CoA / SDS
Product Details
Assay Procedure
Citations (3)
FAQs
Supplemental Products
Reviews
  • Assay Type
    Solid Phase Sandwich ELISA
  • Format
    96-well strip plate
  • Assay Length
    5.5 hours
  • Sample Type & Volume Required Per Well
    Cell Culture Supernates (50 uL), Serum (50 uL), EDTA Plasma (50 uL), Heparin Plasma (50 uL)
  • Sensitivity
    0.116 ng/mL
  • Assay Range
    0.8 - 50 ng/mL (Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma)
  • Specificity
    Natural and recombinant human PAPP-A
  • Cross-reactivity
    < 0.5% cross-reactivity observed with available related molecules.Cross-species reactivity not tested.
  • Interference
    No significant interference observed with available related molecules.
Control Available
QC23 , Quantikine Immunoassay Control Group 8 - Please Inquire
Product Summary
The Quantikine Human PAPP-A Immunoassay is a 5.5 hour sandwich-type solid phase ELISA designed to measure human PAPP-A in cell culture supernates, serum, and plasma. It contains NS0-expressed recombinant human PAPP-A and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human PAPP-A showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for naturally occurring PAPP-A.

Precision
Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested on one plate to assess intra-assay precision
Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in separate assays to assess inter-assay precision
Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma
Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 40 40 40
Mean 5.49 17.4 32.7 5.2 16.4 31.4
Standard Deviation 0.32 0.78 1.39 0.44 1.14 2.04
CV% 5.8 4.5 4.3 8.5 6.9 6.5

Recovery

The recovery of PAPP-A spiked to levels throughout the range of the assay was evaluated.

Sample Type Average % Recovery Range %
Cell Culture Media (n=4) 110 90-117
EDTA Plasma (n=4) 97 89-108
Heparin Plasma (n=4) 95 86-111
Serum (n=4) 92 84-104
Linearity
To assess the linearity of the assay, samples containing and/or spiked with high concentrations of PAPP-A were serially diluted in Calibrator Diluent to produce samples with values within the dynamic range of the assay.
 Pappalysin-1/PAPP-A [HRP]
Product Datasheets

Certificate of Analysis Lookup

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Certificate of Analysis Lookup

Certificate of Analysis Request Form

To download a Certificate of Analysis, please enter the catalog and lot numbers in the search box below.

Note: Certificate of Analysis not available for kit components.

Preparation and Storage
  • Storage
    Store the unopened product at 2 - 8 °C. Do not use past expiration date.
Background: Pappalysin-1/PAPP-A
Pappalysins comprise one of the five families of Metzincins (other families include ADAMs/ADAMTSs, MMPs, Astacins, and Serralysins). Pappalysin-1 (PAPP-A) is an important pregnancy protein and increases in plasma by a factor of about 150 during pregnancy. Reduced maternal serum PAPP-A is a major marker of Down syndrome in the first trimester of pregnancy. PAPP-A cleaves IGFBP-4 and -5 (insulin-like growth factor-binding protein-4 and 5) at a single site, resulting in the release of bioactive IGF. Pappalysin-2 (PAPP-A2; also called PAPP-E) shares 45% amino acid identity with PAPP-A and cleaves IGFBP-2.
  • Long Name:
    Pregnancy-associated Plasma Protein 1
  • Entrez Gene IDs:
    5069 (Human)
  • Alternate Names:
    ASBABP2; DIPLA1; EC 3.4.24.79; IGFBP-4ase; IGFBP-4aseaspecific BCL2 ARE-binding protein 2; IGF-dependent IGFBP-4 protease; insulin-like growth factor-dependent IGF binding protein-4 protease; Insulin-like growth factor-dependent IGF-binding protein 4 protease; PAPA; PAPPA; PAPPA1; PAPP-A1; PAPP-Adifferentially placenta 1 expressed protein; Pappalysin1; Pappalysin-1; pregnacy-associated plasma protein A; Pregnancy-associated plasma protein A; pregnancy-associated plasma protein A, pappalysin 1
Related Research Areas
Assay Procedure
Refer to the product for complete assay procedure.

Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate.
  1.   Prepare all reagents, standard dilutions, and samples as directed in the product insert.
  2.   Remove excess microplate strips from the plate frame, return them to the foil pouch containing the desiccant pack, and reseal.

  3. 100 µL Assay Diluent
  4.   Add 100 µL of Assay Diluent to each well.

  5. 50 µL Standard, Control, or Sample
  6.   Add 50 µL of Standard, control, or sample to each well within 15 minutes. Cover with a plate sealer, and incubate at room temperature for 3 hours.
  7.   Aspirate each well and wash, repeating the process 3 times for a total of 4 washes.

  8. 200 µL Conjugate
  9.   Add 200 µL of Conjugate to each well. Cover with a new plate sealer, and incubate at room temperature for 2 hours.
  10.   Aspirate and wash 4 times.

  11. 200 µL Substrate Solution
  12.   Add 200 µL Substrate Solution to each well. Incubate at room temperature for 30 minutes. PROTECT FROM LIGHT.

  13. 50 µL Stop Solution
  14.   Add 50 µL of Stop Solution to each well. Read at 450 nm within 30 minutes. Set wavelength correction to 540 nm or 570 nm.
Citations:

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

3 Citations: Showing 1 - 3
Filter your results:

Species
Sample Type
  1. Predicting first trimester pregnancy outcome: derivation of a multiple marker test
    Authors: S Senapati, MD Sammel, SF Butts, P Takacs, K Chung, KT Barnhart
    Fertil. Steril., 2016;106(7):1725-1732.e3.
    Species: Human
    Sample Type: Serum
  2. A proof-of-principle gel-free proteomics strategy for the identification of predictive biomarkers for the onset of pre-eclampsia.
    Authors: Blankley RT, Gaskell SJ, Whetton AD
    BJOG, 2009;116(11):1473-80.
    Species: Human
    Sample Type: Plasma
  3. Increased levels of pregnancy-associated plasma protein-A2 in the serum of pre-eclamptic patients.
    Authors: Nishizawa H, Pryor-Koishi K, Suzuki M
    Mol. Hum. Reprod., 2008;14(10):595-602.
    Species: Human
    Sample Type: Serum

FAQs

No product specific FAQs exist for this product, however you may

View all ELISA FAQs
ELISA Controls
Description Application Cat# Citations Images  

Quantikine Immunoassay Control Group 8

Ctrl QC23  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Supplemental ELISA Products
Description Application Cat# Citations Images  

Quantikine ELISA Wash Buffer 1

ELISA WA126 6  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Have you used Human Pappalysin-1/PAPP-A Quantikine ELISA Kit?

Submit a review and receive a $25US/€18/£15/$25CAN amazon gift card if you include an image - $10US/€7/£6/$10CAN Amazon card for reviews without an image. Limited to verified customers in USA, Canada and Europe.

Order Details

Contact Us to Order
reload

Feedback

Customer Information
R&D Systems Guarantee