Western blot shows lysate of human pregnant sera. PVDF membrane was probed with 0.1 µg/mL of Goat Anti-Human Pappalysin-1/PAPP-A Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2487) followed by ...read more
Mouse myeloma cell line NS0-derived recombinant human Pappalysin‑1/PAPP‑A 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.
Source
N/A
Isotype
IgG
Clonality
Polyclonal
Host
Goat
Gene
PAPPA
Purity Statement
Antigen Affinity-purified
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Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Preservative
No Preservative
Concentration
LYOPH
Reconstitution Instructions
Reconstitute at 0.2 mg/mL in sterile PBS.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Pappalysin-1/PAPP-A Antibody [Unconjugated]
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
Background
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.
Boldt, H.B. et al. (2001) Biochem. J. 358:359.
Fialova L. and I.M. Malbohan (2002) Bratisl. Lek. Listy 103:194.
Laursen, L.S. et al. (2001) FEBS Lett. 504:36.
Conover, C.A. et al. (2004) Development 131:1187.
Boldt, H.B. et al. (2004) J. Biol. Chem. 279:38525.
Limitations
This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.
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FAQs for Pappalysin-1/PAPP-A Antibody (AF2487). (Showing 1 - 1 of 1 FAQs).
I am highly interested to use couple of Anti-PAPP-A antibodies from your reputed companies for my research work. I have got the information regarding the immunogen used to generate these antibodies, however could not get any information regarding the specific amino acids/epitope to which your Anti-PAPP-A Antibodies binds with the antigen (PAPP-A).
Unfortunately, none of our PAPP A antibodies have been epitope mapped. Many of them have also been generated against full-length PAPP A, so there are many potential binding sites.
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