EFNA5 / Ephrin-A5 Protein (His Tag)

Ephrin-A5 / EFNA5 Protein

Ephrin-A5 Protein Product Information

• Ephrin-A5 Synonym: EFNA5, AF1, EFL5, RAGS, EPLG7, GLC1M, LERK7
• Protein Construction: A DNA sequence encoding the extracellular domain ( Met 1 - Asn 203 ) of human Ephrin-A5 ( NP_001953.1 ) precursor was expressed with a C-terminal polyhistidine tag.
• Source: Human
• Expression Host: Human Cells

Ephrin-A5 Protein QC Testing

• Purity: > 97 % as determined by SDS-PAGE
• Bio-activity: Measured by its binding ability in a functional ELISA
  Immobilized human EPHA5 at 20 μg/ml ( 100 μl/well ) can bind human EFNA4 with a linear ranger of 1.28 - 32 ng/ml
• Endotoxin: < 1.0 EU per μg of the protein as determined by the LAL method.
• Stability: Samples are stable for up to twelve months from date of receipt at -70℃
• Predicted N terminal: Gln 21
• Molecular Mass: The recombinant human Ephrin-A5 consists of 194 amino acids and has a calculated molecular mass of 23 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of rhEphrin-A5 is approximately 27 kDa due to glycosylation.
• Formulation: Lyophilized from sterile PBS , pH 7.4
  1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
  2. Please contact us for any concerns or special requirements.
• SDS-PAGE:

Ephrin-A5 Protein Usage Guide

• Storage: Store it under sterile conditions at -70℃. It is recommended that the protein be aliquoted and be used as soon as possible. Avoid repeated freeze-thaw cycles.
• Reconstitution: A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

Ephrin-A5 Protein Description

Ephrin-A5, also known as AL-1, RAGS, or LERK-7 (ligand for eph-related kinases, 7), is a member of the ephrin ligand family which binds the members of Eph receptor subfamily of tyrosine kinases. Based on their structure and sequence relationships, ephrins are divided into ephrin-A and ephrin-B class, and ephrin-A members are anchored to the membrane by GPI linkage. Ephrin-A5 is expressed with the highest levels in human adult brain, heart, spleen, and ovary and human fetal brain, lung, and kidney. This ligand has been reported to bind Eph A2, Eph A3, Eph A4, Eph A5, Eph A6, Eph A7, Eph A8, and Eph B2 receptors. The interactions between Eph receptors and their ephrin ligands have been implicated in mediating developmental events, particularly in the nervous system through regulating cell migration and axon pathfinding. It has been reported that Ephrin-A5 prevents axon bundling in cocultures of cortical neurons with astrocytes, a model of late stage nervous system development and differentiation.

References

1. Wilkinson, D.G. 2001, Nat. Rev. Neurosci. 2: 155-164.
2. Kozlosky, C.J. et al., 1997, Cytokine. 9: 540-549.
3. Pasquale, E.B. et al., 1997, Curr. Opin.Cell Biol. 9: 608-615.
4. Himanen, J.P. et al., 2004, Nat. Neurosci. 7: 501-509.
5. Eberhart, J. et al., 2004, J. Neurosci. 24: 1070-1078.