Human Pappalysin-1/PAPP-A Alexa Fluor® 532-conjugated Antibody
R&D Systems, part of Bio-Techne | Catalog # AF2487X
Conjugate
Catalog #
Key Product Details
Species Reactivity
Human
Applications
Western Blot, Immunoprecipitation
Label
Alexa Fluor 532 (Excitation = 534 nm, Emission = 553 nm)
Antibody Source
Polyclonal Goat IgG
Product Specifications
Immunogen
Mouse myeloma cell line NS0-derived recombinant human Pappalysin‑1/PAPP‑A
Glu82-Asp1214
Accession # Q13219
Glu82-Asp1214
Accession # Q13219
Specificity
Detects human Pappalysin‑1/PAPP‑A in direct ELISAs and Western blots. In direct ELISAs, less than 5% cross-reactivity with recombinant human PAPP-A2 is observed.
Clonality
Polyclonal
Host
Goat
Isotype
IgG
Applications
Application
Recommended Usage
Immunoprecipitation
Optimal dilution of this antibody should be experimentally determined.
Western Blot
Optimal dilution of this antibody should be experimentally determined.
Formulation, Preparation, and Storage
Purification
Antigen Affinity-purified
Formulation
Supplied 0.2mg/ml in 1X PBS with RDF1 and 0.09% Sodium Azide
Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Protect from light. Do not freeze. 12 months from date of receipt, 2 to 8 °C as supplied
Background: Pappalysin-1/PAPP-A
Pappalysins belong to a fifth family of metzincins that consists of ADAMs/ADAMTSs, MMPs, astacins and serrylysins (1). PAPP-A is an important pregnancy protein and increases in plasma by a factor of about 150 during pregnancy as compared to the nonpregnant state. PAPP-A is also a major marker of Down syndrome in the first trimester of pregnancy because maternal serum levels of PAPP-A are significantly reduced when a fetus affected by Down syndrome is present (2). PAPP-A cleaves Insulin-like Growth Factor-Binding Protein-4 and -5 (IGFBP-4 and -5) at a single site, resulting in the release of bioactive IGF (3). Lack of IGFBP-4 cleavage in embryonic fibroblasts derived from PAPP-A knockout mice indicates that PAPP-A functions as a physiological IGFBP-4 protease (4). Three Lin12-Notch repeats (LNR) in the PAPP-A protein bind Ca2+ and are required for the cleavage of IGFBP-4, not IGFBP-5, by PAPP-A (5). The C-terminal LNR (residues 1476 to 1503) is not present in rhPAPP-A (residues 82 to 1214), which starts at the N-terminus of the mature chain and ends before the five Sushi (SCR) modules. As an active protease, rhPAPP-A cleaves IGFBP-5, which can be inhibited by 1,10-phenanthroline.
Long Name
Pregnancy-associated Plasma Protein 1
Alternate Names
ASBABP2, DIPLA1, IGFBP-4ase, PAPA, PAPP-A1, PAPPA, Pappalysin1
Gene Symbol
PAPPA
UniProt
Additional Pappalysin-1/PAPP-A Products
Product Specific Notices
This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.
For research use only
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