Recombinant Human Ephrin-A4 Fc Chimera Biotinylated Protein

• Reactivity: Hu
• Applications: Binding Activity

Recombinant Human Ephrin-A4 Fc Chimera Biotinylated Protein Summary

• Details of Functionality: Measured by its binding ability in a functional ELISA. Immobilized rmEphA7/Fc Chimera at 2 µg/mL (100 µL/well) can bind biotinylated rhEphrin-A4/Fc Chimera with a linear range of 0.16-10 ng/mL. Optimal dilutions should be determined by each laboratory for each application.
• Source: Mouse myeloma cell line, NS0-derived human Ephrin-A4 protein
  

  Human Ephrin-A4 (Leu26 - Gly171) Accession # P52798	IEGRMD	Human IgG1 (Pro100 - Lys330)	6-His tag
  N-terminus			C-terminus

• Accession #: P52798
• N-terminal Sequence: Leu26
• Structure / Form: Disulfide-linked homodimer
• Protein/Peptide Type: Recombinant Proteins
• Gene: EFNA4
• Purity: >90%, by SDS-PAGE under reducing conditions and visualized by silver stain

Applications/Dilutions

• Dilutions:
  • Binding Activity
• Theoretical MW: 43.7 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: 50 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 with BSA as a carrier protein.
• Purity: >90%, by SDS-PAGE under reducing conditions and visualized by silver stain
• Reconstitution Instructions:

  Reconstitute with sterile PBS at 100 μg/mL.

Notes

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

Alternate Names for Recombinant Human Ephrin-A4 Fc Chimera Biotinylated Protein

• EFL4
• EFL-4
• EFNA4
• EPH-related receptor tyrosine kinase ligand 4
• EphrinA4
• Ephrin-A4
• EPLG4MGC125826
• LERK-4
• LERK4FLJ57652
• ligand of eph-related kinase 4

Background

Ephrin-A4, also known as LERK-4 and EFL-4 (1), is a member of the ephrin ligand family which binds members of the Eph receptor family. All ligands share a conserved extracellular sequence, which most likely corresponds to the receptor binding domain. This conserved sequence consists of approximately 125 amino acids and includes four invariant cysteines. The A-class ligands have a GPI anchor following the conserved sequence. Ephrin-A4 has been shown to bind EphA2, EphA3, EphA4, EphA5, EphA6, EphA7, and EphB1 (2, 3). The extracellular domains of human and mouse ephrin-A4 share 80% amino acid identity. Only membrane-bound or Fc-clustered ligands are capable of activating the receptor in vitro. While soluble monomeric ligands bind the receptor, they do not induce receptor autophosphorylation and activation (2). In vivo, the ligands and receptors display reciprocal expression (3). It has been found that nearly all receptors and ligands are expressed in developing and adult neural tissue (3). The Eph/ephrin families also appear to play a role in angiogenesis (3).

1. Eph Nomenclature Committee [letter] (1997) Cell 90:403.
2. Flanagan, J.G. and P. Vanderhaegen (1998) Annu. Rev. Neurosci. 21:309.
3. Pasquale, E.B. (1997) Curr. Opin. Cell. Biol. 9:608.

Publications for Ephrin-A4 (BT369)(1)

Publication using BT369

• Wilson TR, Fridlyand J, Yan Y, Penuel E, Burton L, Chan E, Peng J, Lin E, Wang Y, Sosman J, Ribas A, Li J, Moffat J, Sutherlin DP, Koeppen H, Merchant M, Neve R, Settleman J Widespread potential for growth-factor-driven resistance to anticancer kinase inhibitors. Nature, 2012-07-26;487(7408):505-9. 2012-07-26 [PMID: 22763448] (Bioassay, Human)

Bioinformatics

• Gene Symbol: EFNA4
• Uniprot:
  • P52798()