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Recombinant Human EphB4 Protein, CF

Catalog #: 3038-B4
3 Citations 1 Review Datasheet / COA / SDS
Catalog # Availability Size / Price Qty
3038-B4-100
R&D Systems Recombinant Proteins and Enzymes
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Product Details
Citations (3)
FAQs
Supplemental Products
Reviews (1)
Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Human EphB4 Protein, CF Summary

Product Specifications

Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its binding ability in a functional ELISA. Immobilized rhEphB4 at 2 µg/mL (100 µL/well) can bind rmEphrin-B2/Fc Chimera with a linear range of 0.0780- 5.00 ng/mL.
Source
Mouse myeloma cell line, NS0-derived human EphB4 protein
Leu16-Ala539, with a C-terminal 6-His tag
Accession #
AAH52804.1
N-terminal Sequence
Analysis
Leu16
Predicted Molecular Mass
57.9 kDa
SDS-PAGE
70-75 kDa, under reducing conditions.

Product Datasheets

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3038-B4

Product Datasheet
COA
SDS

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

3038-B4

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
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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Background: EphB4

EphB4, also known as Htk, Myk1, Tyro11, and Mdk2, is a member of the Eph receptor tyrosine kinase family and binds Ephrin-B2. The A and B class Eph proteins have a common structural organization (1 - 4). The human EphB4 cDNA encodes a 987 amino acid precursor that includes a 15 amino acid (aa) signal sequence, a 524 aa extracellular domain (ECD), a 21 aa transmembrane segment, and a 427 aa cytoplasmic domain (5). The ECD contains an N-terminal globular domain, a cysteine-rich domain, and two fibronectin type III domains. The cytoplasmic domain contains a juxtamembrane motif with two tyrosine residues which are the major autophosphorylation sites, a kinase domain, and a conserved sterile alpha motif (SAM) (5). Activation of kinase activity occurs after membrane-bound or clustered ligand recognition and binding. The ECD of human EphB4 shares 89% aa sequence identity with mouse EphB4 and 42 - 45% aa sequence identity with human EphB1, 2, and 3. EphB4 is expressed preferentially on venous endothelial cells (EC) and inhibits cell-cell adhesion, chemotaxis, and angiogenesis. Opposing effects are induced by signaling through Ephrin-B2 expressed on arterial EC: adhesion, endothelial cell migration, and vessel sprouting (6). EphB4 singaling contributes to new vascularization by guiding venous EC away from Ephrin-B2 expressing EC. Ephrin-B2 signaling induces arterial EC to migrate towards nascent EphB4 expressing vessels (6). The combination of forward signaling through EphB4 and reverse signaling through Ephrin-B2 promotes in vivo mammary tumor growth and tumor-associated angiogenesis (7). EphB4 promotes the differentiation of megakaryocytic and erythroid progenitors but not granulocytic or monocytic progenitors (8, 9).

References
  1. Poliakov, A. et al. (2004) Dev. Cell 7:465.
  2. Surawska, H. et al. (2004) Cytokine Growth Factor Rev. 15:419.
  3. Pasquale, E.B. (2005) Nat. Rev. Mol. Cell Biol. 6:462.
  4. Davy, A. and P. Soriano (2005) Dev. Dyn. 232:1.
  5. Bennett, B.D. et al. (1994) J. Biol. Chem. 269:14211.
  6. Fuller, T. et al. (2003) J. Cell Sci. 116:2461.
  7. Noren, N.K. et al. (2004) Proc. Natl. Acad. Sci. 101:5583.
  8. Wang, Z. et al. (2002) Blood 99:2740.
  9. Inada, T. et al. (1997) Blood 89:2757.
Long Name
Eph Receptor B4
Entrez Gene IDs
2050 (Human); 13846 (Mouse)
Alternate Names
EC 2.7.10; EC 2.7.10.1; EPH receptor B4; EphB4; ephrin type-B receptor 4; hepatoma transmembrane kinase; Htk; HTKephrin receptor EphB4; Mdk2; Myk1; soluble EPHB4 variant 1; soluble EPHB4 variant 2; soluble EPHB4 variant 3; Tyro11; Tyrosine-protein kinase receptor HTK; Tyrosine-protein kinase TYRO11

Citations for Recombinant Human EphB4 Protein, CF

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
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  1. EphB4 forward signalling regulates lymphatic valve development.
    Authors: Zhang, Gu, Brady, John, Liang, Wei-Chin, Wu, Yan, Henkemeyer, Mark, Yan, Minhong
    Nat Commun, 2015-04-13;6(0):6625.
    Species: Human
    Sample Types: Antibody
    Applications: Enzyme Assay
  2. Ephrin-B2 controls VEGF-induced angiogenesis and lymphangiogenesis.
    Authors: Wang Y, Nakayama M, Pitulescu ME, Schmidt TS, Bochenek ML, Sakakibara A, Adams S, Davy A, Deutsch U, Luthi U, Barberis A, Benjamin LE, Makinen T, Nobes CD, Adams RH
    Nature, 2010-05-27;465(7297):483-6.
    Species: Mouse
    Sample Types: Whole Cells
    Applications: ICC
  3. Soluble EphB4 inhibition of PDGF-induced RPE migration in vitro.
    Authors: He S, Kumar SR, Zhou P, Krasnoperov V, Ryan SJ, Gill PS, Hinton DR
    Invest. Ophthalmol. Vis. Sci., 2009-08-20;51(1):543-52.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay

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Recombinant Human EphB4 Protein, CF
By Anonymous on 07/05/2022
Application: Immunoassay Standard

good standard for ELISA

Immunoassay Standard Recombinant Human EphB4 Protein, CF 3038-B4