Western blot shows lysates of K562 human chronic myelogenous leukemia cell line, COLO 205 human colorectal adenocarcinoma cell line, ZR-75 human breast cancer cell line, and HUVEC human umbilical vein endothelial cells. ...read more
MCF-7 human breast cancer cell line was stained with Goat Anti-Human EphB4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3038, filled histogram) or isotype control antibody (Catalog # AB-108-C, open ...read more
EphB4 was detected in immersion fixed paraffin-embedded sections of human kidney using 15 µg/mL Goat Anti-Human EphB4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3038) overnight at 4 °C. Tissue was ...read more
Simple Western lane view shows lysates of HUVEC human umbilical vein endothelial cells, loaded at 0.2 mg/mL. A specific band was detected for EphB4 at approximately 127 kDa (as indicated) using 50 µg/mL of Goat ...read more
Genetic Strategies: Western blot shows lysates of HEK293T human embryonic kidney parental cell line and EphB4 knockout HEK293T cell line (KO). PVDF membrane was probed with 2 µg/mL of Goat Anti-Human EphB4 ...read more
EphB4 expression in transfected A375 melanoma cells and corresponding tumor xenografts. Western blot analysis of EphB4 and its ligand EphrinB2 in A375, A375-pIRES, and A375-EphB4 whole cell lysates (A) and tumor lysates ...read more
EphB4 expression in transfected A375 melanoma cells and corresponding tumor xenografts. Western blot analysis of EphB4 and its ligand EphrinB2 in A375, A375-pIRES, and A375-EphB4 whole cell lysates (A) and tumor lysates ...read more
EphB4 expression in transfected A375 melanoma cells and corresponding tumor xenografts. Western blot analysis of EphB4 and its ligand EphrinB2 in A375, A375-pIRES, and A375-EphB4 whole cell lysates (A) and tumor lysates ...read more
Mouse myeloma cell line NS0-derived recombinant human EphB4 Leu16-Ala539 Accession # P54760
Specificity
Detects human EphB4 in direct ELISAs and Western blots. In direct ELISAs, less than 10% cross-reactivity with recombinant mouse (rm) EphB4 is observed and less than 1% cross-reactivity with recombinant human (rh) EphA4, rhEphA3, rhEphB2, and rhEphB3 is observed.
Source
N/A
Isotype
IgG
Clonality
Polyclonal
Host
Goat
Gene
EPHB4
Purity Statement
Antigen Affinity-purified
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.
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.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Preservative
No Preservative
Concentration
LYOPH
Reconstitution Instructions
Reconstitute at 0.2 mg/mL in sterile PBS.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for EphB4 Antibody [Unconjugated]
EC 2.7.10
EC 2.7.10.1
EPH receptor B4
EphB4
ephrin type-B receptor 4
hepatoma transmembrane kinase
Htk
HTKephrin receptor EphB4
Mdk2
Myk1
soluble EPHB4 variant 1
soluble EPHB4 variant 2
soluble EPHB4 variant 3
Tyro11
Tyrosine-protein kinase receptor HTK
Tyrosine-protein kinase TYRO11
Background
EphB4, also known as Htk, Myk1, Tyro11, and Mdk2, is a member of the Eph receptor tyrosine kinase family and binds Ephrin-B2. The A and B class Eph proteins have a common structural organization (1-4). The human EphB4 cDNA encodes a 987 amino acid (aa) precursor that includes a 15 aa signal sequence, a 524 aa extracellular domain (ECD), a 21 aa transmembrane segment, and a 427 aa cytoplasmic domain (5). The ECD contains an N-terminal globular domain, a cysteine-rich domain, and two fibronectin type III domains. The cytoplasmic domain contains a juxtamembrane motif with two tyrosine residues which are the major autophosphorylation sites, a kinase domain, and a conserved sterile alpha motif (SAM) (5). Activation of kinase activity occurs after membrane-bound or clustered ligand recognition and binding. The ECD of human EphB4 shares 89% aa sequence identity with mouse EphB4 and 42-45% aa sequence identity with human EphB1, 2, and 3. EphB4 is expressed preferentially on venous endothelial cells (EC) and inhibits cell-cell adhesion, chemotaxis, and angiogenesis. Opposing effects are induced by signaling through Ephrin-B2 expressed on arterial EC: adhesion, endothelial cell migration, and vessel sprouting (6). EphB4 singaling contributes to new vascularization by guiding venous EC away from Ephrin-B2 expressing EC. Ephrin-B2 signaling induces arterial EC to migrate towards nascent EphB4 expressing vessels (6). The combination of forward signaling through EphB4 and reverse signaling through Ephrin-B2 promotes in vivo mammary tumor growth and tumor-associated angiogenesis (7). EphB4 promotes the differentiation of megakaryocytic and erythroid progenitors but not granulocytic or monocytic progenitors (8, 9).
Poliakov, A. et al. (2004) Dev. Cell 7:465.
Surawska, H. et al. (2004) Cytokine Growth Factor Rev. 15:419.
Bennett, B.D. et al. (1994) J. Biol. Chem. 269:14211.
Fuller, T. et al. (2003) J. Cell Sci. 116:2461.
Noren, N.K. et al. (2004) Proc. Natl. Acad. Sci. USA 101:5583.
Wang, Z. et al. (2002) Blood 99:2740.
Inada, T. et al. (1997) Blood 89:2757.
Limitations
This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.
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