Pappalysin-1/PAPP-A Recombinant Protein Antigen

Novus Biologicals | Catalog # NBP1-90087PEP

Novus Biologicals
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Key Product Details

Source

E. coli

Applications

Antibody Competition
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Product Specifications

Description

A recombinant protein antigen with a N-terminal His6-ABP tag corresponding to human PAPPA.

Source: E. coli

Amino Acid Sequence: SCLDHNSESIILPMNVTVRDIPHWLNPTRVERVVCTAGLKWYPHPALIHCVKGCEPFMGDNYCDAINNRAFCNYDGGDCCTSTVKTKKVTPFPMSCDLQGDCACRDPQAQEHSRKDL

Fusion Tag: N-terminal His6ABP (ABP = Albumin Binding Protein derived from Streptococcal Protein G)

This product is intended to be used as a blocking antigen for antibody competition assays. Any other use of this antigen is done at the risk of the user. The use of this product for commercial production is strictly prohibited. Please contact technical support if you have any questions.

Purity

>80% by SDS-PAGE and Coomassie blue staining

Predicted Molecular Mass

31 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Applications

Antibody Competition (10 - 100 molar excess)

Application Notes

This recombinant antigen is only intended to be used as a blocking agent to confirm antibody specificity with the corresponding antibody, catalog number NBP1-90087.

It is purified by IMAC chromatography, and the expected concentration is greater than 0.5 mg/ml.

For current lot information, including availability, please contact our technical support team click nb-technical@bio-techne.com

Protein / Peptide Type

Recombinant Protein Antigen

Formulation, Preparation, and Storage

NBP1-90087PEP
Formulation PBS and 1M Urea, pH 7.4.
Preservative No Preservative
Concentration Please see the vial label for concentration. If unlisted please contact technical services.
Shipping The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage Store at -20C. Avoid freeze-thaw cycles.

Background: Pappalysin-1/PAPP-A

PAPP A was originally isolated from pregnancy serum as heterotetrameric protein complex with molecular weight approximately 500 kDa, consisting of two PAPP A subunits disulfide-linked with two subunits of the proform of eosinophil major basic protein (proMBP). In such a complex proMBP functions as an inhibitor of PAPP A proteinase activity. PAPP A is widely used as a marker of some pathologies during pregnancy. Reduced level of PAPP A in pregnancy blood in the first trimester is associated with fetal Down syndrome. PAPP A is considered as one of the best biochemical markers in early pregnancy used to screen for Down syndrome during the first trimester (Wald, N. J. et al).

Long Name

Pregnancy-associated Plasma Protein 1

Alternate Names

ASBABP2, DIPLA1, IGFBP-4ase, PAPA, PAPP-A1, PAPPA, Pappalysin1

Gene Symbol

PAPPA

Additional Pappalysin-1/PAPP-A Products

Product Documents for Pappalysin-1/PAPP-A Recombinant Protein Antigen

Certificate of Analysis

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

Product Specific Notices for Pappalysin-1/PAPP-A Recombinant Protein Antigen

This product is for research use only and is not approved for use in humans or in clinical diagnosis. This product is guaranteed for 1 year from date of receipt.

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FAQs for Pappalysin-1/PAPP-A Recombinant Protein Antigen

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  • Q: 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).

    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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