Human TFPI-2 Antibody

Catalog # Availability Size / Price Qty
AF2545
AF2545-SP
Product Details
Citations (2)
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Human TFPI-2 Antibody Summary

Species Reactivity
Human
Specificity
Detects human TFPI‑2 in direct ELISAs and Western blots. In direct ELISAs, approximately 10% cross‑reactivity with recombinant mouse TFPI-2 is observed and less than 5% cross‑reactivity with recombinant human TFPI‑1 is observed.
Source
Polyclonal Goat IgG
Purification
Antigen Affinity-purified
Immunogen
Mouse myeloma cell line NS0-derived recombinant human TFPI-2
Asp23-Lys213
Accession # P48307
Formulation
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
Endotoxin Level
<0.10 EU per 1 μg of the antibody by the LAL method.

Applications

Recommended Concentration
Sample
Western Blot
0.1 µg/mL
Recombinant Human TFPI‑2 (Catalog # 2545-PI)
Immunoprecipitation
25 µg/mL
Conditioned cell culture medium spiked with Recombinant Human TFPI‑2 (Catalog # 2545‑PI), see our available Western blot detection antibodies
Neutralization
Measured by its ability to neutralize Recombinant Human TFPI-2 (0.17 µg/mL, Catalog # 2545-PI) inhibition of Trypsin (0.05 µg/mL) cleavage of the fluorogenic peptide substrate Mca-RPKPVE-Nval-WRK(Dnp)-NH2 (10 µM, Catalog # ES002 ). The Neutralization Dose (ND50) is typically 1.4 µg/mL.

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Preparation and Storage

Reconstitution
Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Availability
Size / Price
Qty
RB01
Shipping
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
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.

Background: TFPI-2

Human Tissue Factor Pathway Inhibitor 2 (TFPI-2), also known as placental protein 5 (PP5) and retinal pigment epithelial cell factor 1 (REF-1), is a secreted protein with a N-terminal acidic region, three Kunitz (K) domains (residues 36 to 86, 96 to 149 and 158 to 208) separated with by two linker regions, and a C-terminal basic region (1‑3). Expression of TFPI-2 is down-regulated in several cancers, which may contribute to tumor progression in these cancers (4). The purified recombinant human TFPI-2 ends at residue 213 and does not contain the last 22 residues (residues 214 to 235) in the C-terminal region. It inhibits the activity of recombinant human Coagulation Factor VII (R&D Systems, Catalog # 2338-SE) in the presence of recombinant human Tissue Factor (R&D Systems, Catalog # 2339-PA).

References
  1. Miyagi, Y. et al. (1994) J. Biochem. 116:939.
  2. Sprecher, C.A. et al. (1994) Proc. Natl. Acad. Sci. USA 91:3353.
  3. Tanaka, Y. et al. (2004) Invest. Ophthalmol. Vis. Sci. 45:245.
  4. Rollin, J. et al. (2005) Br, J. Cancer 92:775.
Long Name
Tissue Factor Pathway Inhibitor 2
Entrez Gene IDs
7980 (Human)
Alternate Names
Placental protein 5; PP5; PP5FLJ21164; REF-1; TFPI2; TFPI-2; TFPI-2REF1; tissue factor pathway inhibitor 2

Product Datasheets

Citations for Human TFPI-2 Antibody

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.

2 Citations: Showing 1 - 2
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  1. TFPI-2 suppresses breast cancer cell proliferation and invasion through regulation of ERK signaling and interaction with actinin-4 and myosin-9
    Authors: G Wang, W Huang, W Li, S Chen, W Chen, Y Zhou, P Peng, W Gu
    Sci Rep, 2018;8(1):14402.
    Species: Human
    Sample Types: Cell Lysates
  2. Use of an immunoaffinity-mass spectrometry-based approach for the quantification of protein biomarkers from serum samples of lung cancer patients.
    Authors: Nicol GR, Han M, Kim J, Birse CE, Brand E, Nguyen A, Mesri M, FitzHugh W, Kaminker P, Moore PA, Ruben SM, He T
    Mol. Cell Proteomics, 2008;7(10):1974-82.
    Species: Human
    Sample Types: Serum
    Applications: Mass Spectrometry

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Isotype Controls

Reconstitution Buffers

Secondary Antibodies

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