Purity:≥95%, by SDS-PAGE visualized with Coomassie® Blue Staining. Description: 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. The human EphB4 cDNA encodes a 987 amino acid precursor that includes a 15 amino acid (aa) signal sequence, a 524 aa extracellular domain (ECD), a 21 aa transmembrane segment, and a 427 aa cytoplasmic domain. 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). 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. EphB4 signaling 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. The combination of forward signaling through EphB4 and reverse signaling through Ephrin-B2 promotes in vivo mammary tumor growth and tumor-associated angiogenesis. EphB4 promotes the differentiation of megakaryocytic and erythroid progenitors but not granulocytic or monocytic progenitors.
59.4-77.7 kDa, under reducing conditions; 52.4-65.0 kDa, under non-reducing conditions
分子类型
蛋白质
产品线
生物产品
储存与运输
物理形态
冻干(Lyophilized)
储存缓冲液
Lyophilized from PBS, pH 7.4
复溶
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute at 1.0 mg/mL in sterile distilled water. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.
储存条件
-20°C储存,避免反复冻融
运输条件
超低温运输
稳定性与储存
在 -20°C 下可保存 1 年。避免冷冻/解冻循环。
图片
Recombinant Human EphB4 Protein (rp184032) - SDS-PAGE 3 μg/lane of Recombinant Human EphB4 Protein was resolved with SDS-PAGE under reducing (R) and non-reducing (N) conditions and visualized by Coomassie® Blue staining, showing a band at 59.4-77.7 kDa under reducing conditions and 52.4-65.0 kDa under non-reducing conditions.
Recombinant Human EphB4 Protein (rp184032) - Binding Activity
Immobilized Recombinant Human EphB4 Protein (rp184032) at 2.0 μg/mL can bind Recombinant Human Ephrin-B2 Protein (rp186546) with the EC50 of 52.41 ng/mL.