Anti-EGFR antibody, rabbit IgG, recombinant

Product ID: anti-EGFR rbIgG (SKU#: MAB0169)

Price:

$499.00

Description

EGFR is known as epidermal growth factor receptor, proto-oncogene c-ErbB-1 , receptor tyrosine-protein kinase erbB-1. It is a member of the epidermal growth factor receptor (EGFR) family of receptor tyrosine kinases (RTK). Four members of the EGFR family have been identified: EGFR (ERBB1, HER1), HER2 (ERBB2), HER3 (ERBB3) and HER4 (ERBB4). They typically contain an extracellular ligand binding domain (ECD), a transmembrane domain (TM), and an intracellular kinase domain that can interact with a multitude of signaling molecules and exhibit both ligand-dependent and ligand-independent activity. The human EGFR has 1210 amino acid (aa), including a 24 aa signal peptide, a 621 aa ECD, and a 23 aa TM segment. It shares 88% aa sequence identity with murine EGFR and 43-44% identity with the ECD of other 3 human EGFR members. EGFR binds to a subset of the EGF family ligands, including EGF, amphiregulin, TGFα, β-cellulin, epiregulin, HB-EGF, and epigen. EGFR signaling is initiated by ligand binding, leading to EGFR receptor homo-/hetero-dimerization and autophosphorylation by the intracellular kinase domain and receptor activation. Subsequently, phosphorylation of cytoplasmic substrates occurs and a signaling cascade is initiated that drives many cellular responses, including changes in gene expression, cytoskeletal rearrangement, anti-apoptosis and increased cell proliferation. EGFR is known to form heterodimers with the ligand-activated HER3 or HER4. EGFR is overexpressed in a variety of tumors. Mutations in EGFR gene are associated with lung cancer. EGFR is the target of several anti-cancer therapeutics. The purified recombinant anti-EGFR monoclonal antibody binds human EGFR with high affinity, neutralizes EGFR signaling activity and inhibits the growth of EGFR-expressing tumor cells.

Product Details

Gene Symbol: EGFR, ERBB, ERBB1, HER1, mENA, PIG61, SA7

NCBI Gene ID: 1956 (human)

Uniprot Entry: P00533 (human)

Construct Details:

Expressed as the combination of a heavy chain (HC) containing VH from anti-EGFR mAb and CH region of rabbit IgG and a light chain (LC) encoding VL from anti-EGFR mAb and CL. Exists as a disulfide linked dimer of the HC and LC hetero-dimer under non-reducing condition.

Source: Mamamlian cells stably expressing anti-EGFR heavy chain and light chain and growing in chemical-defined media with no animal components or antibiotics

M.W.: Calculated molecular mass (kDa): 146 (49 kDa for a single HC, 24 kDa for a single LC); Estimated by SDS-PAGE under non-reducing condition(kDa): 150

Purity: >95% judged by SDS-PAGE under reducing condition (see the gel image above, labeled as DTT "+")

Formulation: Supplied at 0.5 mg/ml in sterile PBS pH7.4 without any carrier protein or preservative (the concentration was determined by UV absorption with an A280nm of 1.0 for 0.73 mg/ml of IgG and verified by SDS-PAGE and Coomassie blue staining).

Endotoxin Level: <0.1 EU per 1 μg of purified recombinant protein determined by the LAL method

Biological Activity: The recombinant antibody binds EGFR ECD (SKU#FCL0083, #FCL0169) with high affinity (K_D < 20 nM as measured by ELISA) and recognizes cell surface EGFR by flow cytometry, IHC staining and fluorescent microscopy. It also inhibits EGFR-expressing tumor cell growth. It has the same binding specificity as anti-EGFR human IgG1 (SKU#MAB0118) and mouse IgG2a (SKU#MAB0520).

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

Restriction: This product is not transferable or re-sellable. Customer obtain no right to transfer, assign, or sublicense its use rights, or to transfer, resell, package, or otherwise distribute the product, or to use the product for the benefit of any third party or for any commercial purpose. Customer may only use the product in compliance with applicable local, state and federal laws, regulations and rules. Customer may not directly or indirectly use the product or allow the transfer, transmission, export or re-export of all or any part of the product in violation of any export control law or regulation of the united states or any other relevant jurisdiction. Your use of this product constitutes acceptance of the terms of this limited use agreement. Please refer to our “terms & conditions” for details. If you are not willing to accept the limitation of this agreement, G&P Biosciences will accept return of the product for a full/partial refund.

Technical Data

Recombinant EGFR ECD protein (SKU#FCL0169) was immobilized at 20 ng/well on a 96-well ELISA plate and incubated with serially diluted anti-EGFR human IgG1 monoclonal antibody (SKU#MAB0118). Anti-HER2 (SKU#MAB0203) human IgG1 monoclonal antibody was used as a control to demonstrate the specificity of EGFR binding under the experimental conditions. The bound antibodies were detected by goat anti-human IgG HRP-conjugated secondary antibody. The ELISA binding curve was fit and K_D was calculated for anti-EGFR : EGFR binding (affinity/avidity) to be 13 ± 0.7 pM.

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

Storage

The product is shipped at 4°C. Upon receipt, centrifuge the product briefly before opening the vial. It is recommended to store small aliquots at the temperature below –20°C for long-term storage and the product is stable for 3 months. The undiluted protein can be stored at 4°C for no more than 2 weeks.

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

References