• Purity

  >95%, by SDS-PAGE under reducing conditions and visualized by silver stain

• Endotoxin Level

  <1.0 EU per 1 μg of the protein by the LAL method.  

• Activity

  Measured by its ability to bind Recombinant Mouse Ephrin‑A1 Fc Chimera (Catalog # ) in a functional ELISA.    
  Immobilized Recombinant Mouse EphA2 Fc Chimera at 2 µg/mL (100 µL/well) can bind Recombinant Mouse Ephrin-A1 Fc Chimera with a linear range of 0.078-5 ng/mL.    
     Optimal dilutions should be determined by each laboratory for each application.  

• Source

  Mouse myeloma cell line, NS0-derived

  Mouse EphA2 (Ala22-Ala535) Accession # AAA82113	IEGRMD	Human IgG1 (Pro100-Lys330)	6-His tag
  N-terminus			C-terminus

• Accession #

• N-terminal Sequence    
  Analysis

  Ala22

• Structure / Form

  Disulfide-linked homodimer

• Predicted Molecular Mass

  84 kDa (monomer)

• SDS-PAGE

  105 kDa, reducing conditions

Background: EphA2

EphA2, also known as Eck, Myk2, and Sek2 (1), is a member of the Eph receptor family which binds members of the ephrin ligand family. There are two classes of receptors, designated A and B. Both the A and B class receptors have an extracellular region consisting of a globular domain, a cysteine-rich domain, and two fibronectin type III domains. This is followed by the transmembrane region and cytoplasmic region. The cytoplasmic region contains a juxtamembrane motif with two tyrosine residues, which are the major autophosphorylation sites, a kinase domain, and a conserved sterile alpha motif (SAM) in the carboxy tail which contains one conserved tyrosine residue. Activation of kinase activity occurs after ligand recognition and binding. EphA2 has been shown to bind ephrin-A3, ephrin-A1, ephrin-A5, ephrin-A4, and ephrin-A2 (2, 3). The extracellular domains of mouse and human EphA2 share greater than 92% 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).

• References:

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.

• Entrez Gene IDs:

  1969 (Human); 13836 (Mouse)

• Alternate Names:

  ARCC2; EC 2.7.10; EC 2.7.10.1; Eck; ECKepithelial cell receptor protein tyrosine kinase; EPH receptor A2; EphA2; ephrin type-A receptor 2; Epithelial cell kinase; Myk2; Sek2; soluble EPHA2 variant 1; Tyrosine-protein kinase receptor ECK