Size Price Inventory
 50ul $250 In stock
 100ul $350 In stock
 200ul $450 In stock

Lead Time: Same day delivery

For pricing and ordering contact:
Local distributors

Product Info

ELISA 1:10000, WB 1:500-1:2000
*The optimal dilutions should be determined by the end user.

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Monoclonal [AFB1642]
EphA8 antibody detects endogenous levels of total EphA8.
Cite Format: Affinity Biosciences Cat# BF0355, RRID:AB_2833666.
Mouse IgG1 in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


EEK; EK3; EPH and ELK related kinase; EPH like kinase 3; Eph receptor A8; EPH- and ELK-related kinase; EPH-like kinase 3; EphA8; EPHA8_HUMAN; Ephrin Type A Receptor 8 Precursor; Ephrin type-A receptor 8; HEK3; KIAA1459; Tyrosine-protein kinase receptor EEK; Tyrosylprotein Kinase;



Purified recombinant fragment of human EphA8 expressed in E. Coli.

This gene belongs to the ephrin receptor subfamily of the protein-tyrosine kinase family. EPH and EPH-related receptors have been implicated in mediating developmental events, particularly in the nervous system. Receptors in the EPH subfamily typically have a single kinase domain and an extracellular region containing a Cys-rich domain and 2 fibronectin type III repeats. The ephrin receptors are divided into 2 groups based on the similarity of their extracellular domain sequences and their affinities for binding ephrin-A and ephrin-B ligands. The protein encoded by this gene functions as a receptor for ephrin A2, A3 and A5 and plays a role in short-range contact-mediated axonal guidance during development of the mammalian nervous system.

PTMs - P29322 As Substrate

Site PTM Type Enzyme
T86 Phosphorylation
S87 Phosphorylation
S177 Phosphorylation
S224 Phosphorylation
S225 Phosphorylation
T454 Phosphorylation
S455 Phosphorylation
S457 Phosphorylation
Y478 Phosphorylation
T498 Phosphorylation
Y610 Phosphorylation
Y616 Phosphorylation P29322 (EPHA8)
T704 Phosphorylation
Y715 Phosphorylation
S782 Phosphorylation
Y793 Phosphorylation
Y839 Phosphorylation P29322 (EPHA8)
T905 Phosphorylation
T907 Phosphorylation
S909 Phosphorylation

PTMs - P29322 As Enzyme

Substrate Site Source
P29322 (EPHA8) Y616 Uniprot
P29322 (EPHA8) Y839 Uniprot

Research Backgrounds


Receptor tyrosine kinase which binds promiscuously GPI-anchored ephrin-A family ligands residing on adjacent cells, leading to contact-dependent bidirectional signaling into neighboring cells. The signaling pathway downstream of the receptor is referred to as forward signaling while the signaling pathway downstream of the ephrin ligand is referred to as reverse signaling. The GPI-anchored ephrin-A EFNA2, EFNA3, and EFNA5 are able to activate EPHA8 through phosphorylation. With EFNA5 may regulate integrin-mediated cell adhesion and migration on fibronectin substrate but also neurite outgrowth. During development of the nervous system plays also a role in axon guidance. Downstream effectors of the EPHA8 signaling pathway include FYN which promotes cell adhesion upon activation by EPHA8 and the MAP kinases in the stimulation of neurite outgrowth (By similarity).


Phosphorylated. Phosphorylation is stimulated upon binding of its ligands including EFNA2, EFNA3 and EFNA5. Autophosphorylation on Tyr-616 is critical for association with FYN. Autophosphorylation on Tyr-839 modulates tyrosine kinase activity (By similarity).

Ubiquitinated. Ubiquitination by CBL regulates the receptor stability and activity through proteasomal degradation. ANKS1A prevents ubiquitination and degradation (By similarity).

Subcellular Location:

Cell membrane>Single-pass type I membrane protein. Cell projection. Early endosome membrane.
Note: Undergoes clathrin-mediated endocytosis upon EFNA5-binding and is targeted to early endosomes.

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Subunit Structure:

Heterotetramer upon binding of the ligand. The heterotetramer is composed of an ephrin dimer and a receptor dimer. Oligomerization is probably required to induce biological responses. May also form heterodimers with other ephrin receptors (By similarity). Interacts with FYN; possible downstream effector of EPHA8 in regulation of cell adhesion. Interacts with PIK3CG; regulates integrin-mediated cell adhesion to substrate. Interacts with TIAM1; regulates clathrin-mediated endocytosis of EPHA8. Interacts with ANKS1A and ANKS1B; EPHA8 kinase activity-independent but stimulated by EPHA8 ubiquitination.


Belongs to the protein kinase superfamily. Tyr protein kinase family. Ephrin receptor subfamily.

Research Fields

· Organismal Systems > Development > Axon guidance.   (View pathway)

Restrictive clause


Affinity Biosciences tests all products strictly. Citations are provided as a resource for additional applications that have not been validated by Affinity Biosciences. Please choose the appropriate format for each application and consult Materials and Methods sections for additional details about the use of any product in these publications.

For Research Use Only.
Not for use in diagnostic or therapeutic procedures. Not for resale. Not for distribution without written consent. Affinity Biosciences will not be held responsible for patent infringement or other violations that may occur with the use of our products. Affinity Biosciences, Affinity Biosciences Logo and all other trademarks are the property of Affinity Biosciences LTD.