Active Recombinant Human EGFR protein, Fc/Avi-tagged, Biotinylated

Specification :
| Description : The EGFR subfamily of receptor tyrosine kinases comprises four members: EGFR (also known as HER-1, ErbB1, or ErbB), ErbB2 (Neu, HER-2), ErbB3 (HER-3), and ErbB4 (HER-4). All family members are type I transmembrane glycoproteins with an extracellular ligand binding domain containing two cysteine-rich domains separated by a spacer region and a cytoplasmic domain containing a membrane-proximal tyrosine kinase domain followed by multiple tyrosine autophosphorylation sites (1-4). Soluble receptors consisting of the extracellular ligand binding domain are generated by alternate splicing in human and mouse (5‑7). Within the mature ECD, human EGFR shares 88% aa sequence identity with mouse and rat EGFR. Human EGFR shares 43%-44% aa sequence identity with the ECD of human ErbB2, ErbB3, and ErbB4. EGFR binds a subset of the EGF family ligands, including EGF, amphiregulin, TGF-alpha, betacellulin, epiregulin, HB-EGF, and epigen (1, 2). Ligand binding induces EGFR homodimerization as well as heterodimerization with ErbB2, resulting in kinase activation, heterodimerization tyrosine phosphorylation and cell signaling (8‑12). EGFR can also be recruited to form heterodimers with the ligand‑activated ErbB3 or ErbB4. EGFR signaling regulates multiple biological functions including cell proliferation, differentiation, motility, and apoptosis (13, 14). EGFR is overexpressed in a wide variety of tumors and is the target of several anti-cancer drugs (15). | Source : HEK293 cells | Species : Human | Tag : Fc/Avi | Form : Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. | Bio-activity : Measured by its binding ability in a functional ELISA. When Human EGFR (Research Grade Cetuximab Biosimilar) Antibody is immobilized at 0.25 μg/mL, 100 μL/well, the concentration of Recombinant Human EGFR Fc Chimera Avi-tag that produces 50% of the optimal binding response is approximately 2-15 ng/mL. | Molecular Mass : 110-130 kDa, under reducing conditions | Protein length : Leu25-Ser645 | Endotoxin : | Purity : >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining. | Applications : Bioactivity | Storage : 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.3 months, -20 to -70 °C under sterile conditions after reconstitution. | Reconstitution : Reconstitute at 500 μg/mL in PBS.