Recombinant Zebrafish Ephrin-B2 Fc Chimera Protein, CF

• Reactivity: Ze
• Applications: Binding Activity
• Format: Carrier-Free

Recombinant Zebrafish Ephrin-B2 Fc Chimera Protein, CF Summary

• Details of Functionality: Measured by its ability to compete with biotinylated rmEphrin-B2/Fc Chimera (R&D Systems, Catalog # BT496) for binding with immobilized rmEph-B2/Fc Chimera in a functional ELISA assay.
  Optimal dilutions should be determined by each laboratory for each application.
• Source: Mouse myeloma cell line, NS0-derived zebrafish Ephrin-B2 protein
  

  Zebrafish Ephrin-B2 (Leu25 - Ala 222) Accession # O73874	IEGRMD	Human IgG1 (Pro100 - Lys330)
  N-terminus		C-terminus

• Accession #: O73874
• N-terminal Sequence: Leu25
• Structure / Form: Disulfide-linked homodimer
• Protein/Peptide Type: Recombinant Proteins
• Gene: efnb2a
• Purity: >90%, by SDS-PAGE under reducing conditions and visualized by silver stain
• Endotoxin Note: <0.01 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

• Dilutions:
  • Binding Activity
• Theoretical MW: 48.5 kDa (monomer).
  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.
• SDS-PAGE: 60-70 kDa, reducing conditions

Packaging, Storage & Formulations

• 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.
• Buffer: Lyophilized from a 0.2 μm filtered solution in PBS.
• Purity: >90%, by SDS-PAGE under reducing conditions and visualized by silver stain
• Reconstitution Instructions: Reconstitute at 100 μg/mL in sterile PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Zebrafish Ephrin-B2 Fc Chimera Protein, CF

• EFNB2
• ELF-2
• ephrin B2
• EphrinB2
• Ephrin-B2
• EPLG5
• HTKL
• Htk-L
• LERK5
• LERK-5
• NLERK-1

Background

Ephrin-B2, also known as Htk-L, ELF-2, LERK-5, and NLERK-1, is a 40 kDa member of the Ephrin-B family of transmembrane ligands that bind and induce the tyrosine autophosphorylation of Eph receptors. The extracellular domains of Ephrin-B ligands are structurally related to GPI-anchored Ephrin-A ligands. Eph-Ephrin interactions are widely involved in the regulation of cell migration, tissue morphogenesis, and cancer progression. Ephrin-B2 preferentially interacts with receptors in the EphB family (1, 2). Mature zebrafish Ephrin-B2 consists of a 201 amino acid (aa) extracelluar domain (ECD), a 21 aa transmembrane segment, and an 87 aa cytoplasmic domain (3). Within the ECD, zebrafish Ephrin-B2 shares 56% aa sequence identity with human, mouse, and rat Ephrin-B2. Ephrin-B2 is expressed presynaptically on neurons (4, 5). It promotes presynaptic development, EphB2 shedding, axonal growth cone collapse, and neurite repulsion, and also regulates inflammatory and neuropathic pain (4 - 6). Ephrin-B2 is expressed by vascular mural cells and arterial vascular and lymphatic endothelium (7, 8). It exerts proliferative and migratory effects on these cells during angiogenesis and lymphangiogenesis in part by regulating the signaling activity of VEGF R2 and VEGF R3 (7 - 9). Ephrin-B2 plays a role in the immune response by mediating monocyte extravasation and T cell costimulation (10, 11). It is upregulated in invasive cancers and promotes tumor cell migration, invasion, and tumor angiogenesis (12 - 14). It functions as a cellular entry receptor for Hendra and Nipah viruses (15). Ephrin-B2 is also important for the separation of the urinary and intestinal tracts during development (16).

1. Miao, H. and B. Wang (2009) Int. J. Biochem. Cell Biol. 41:762.
2. Pasquale, E.B. (2010) Nat. Rev. Cancer 10:165.
3. Durbin, L. et al. (1998) Genes Dev. 12:3096.
4. McClelland, A.C. et al. (2009) Proc. Natl. Acad. Sci. 106:20487.
5. Zhao, J. et al. (2010) Mol. Pain 6:77.
6. Lin, K.-T. et al. (2008) J. Biol. Chem. 283:28969.
7. Foo, S.S. et al. (2006) Cell 124:161.
8. Wang, Y. et al. (2010) Nature 465:483.
9. Sawamiphak, S. et al. (2010) Nature 465:487.
10. Pfaff, D. et al. (2008) J. Cell Sci. 121:3842.
11. Yu, G. et al. (2003) J. Immunol. 171:106.
12. Meyer, S. et al. (2005) Int. J. Oncol. 27:1197.
13. Nakada, M. et al. (2010) Int. J. Cancer 126:1155.
14. Liu, W. et al. (2004) Br. J. Cancer 90:1620.
15. Bonaparte, M.I. et al. (2005) Proc. Natl. Acad. Sci. 102:10652.
16. Dravis, C. et al. (2004) Dev. Biol. 271:272.

Publications for Ephrin-B2 (1088-B2)(2)

Publications using 1088-B2

• Hendricks M, Mathuru AS, Wang H, Silander O, Kee MZ, Jesuthasan S Disruption of Esrom and Ryk identifies the roof plate boundary as an intermediate target for commissure formation. Mol. Cell. Neurosci., 2007-10-16;37(2):271-83. 2007-10-16 [PMID: 18060805] (IHC, Zebrafish)
• D&amp;apos;Souza J, Hendricks M, Le Guyader S, Subburaju S, Grunewald B, Scholich K, Jesuthasan S Formation of the retinotectal projection requires Esrom, an ortholog of PAM (protein associated with Myc). Development, 2004-12-08;132(2):247-56. 2004-12-08 [PMID: 15590740] (Binding Assay, Zebrafish)

Bioinformatics

• Gene Symbol: efnb2a
• Uniprot:
  • O73874()