| Product Name | Anti-EGFRvIII Monoclonal Antibody, Recombinant | 
    
      | Catalog # | EG-369 | 
    
      | Size | 100 µg | 
    
      | Key Features | 
          Rabbit monoclonal antibody produced in HEK293 cells under serum-free, protein-free conditionsPurified by Protein A affinity chromatographyHigh batch-to-batch consistency and reproducibilityLong-term supply security | 
    
      | Clone Number | R6 | 
    
      | Immunogen | Proprietary peptide | 
    
      | Target | Human EGFRvIII mutant | 
    
      | Species Cross-Reactivity | Human | 
    
      | Applications | Flow Cytometry, Immunoprecipitation (IP), ELISA, Western Blot | 
    
      | Recommended Working Concentrations | 
          Flow Cytometry / ELISA: 5 µg/mL final concentrationImmunoprecipitation: 10 µg per 0.3–0.5 mg cell lysateWestern Blot: 1 µg/mL final concentration | 
    
      | Background | Epidermal growth factor receptor variant III (EGFRvIII) is the most common EGFR mutation, present in up to 30% of high-grade gliomas, particularly glioblastoma multiforme (GBM). EGFRvIII is a cancer-specific deletion mutant, restrictively expressed in glioblastoma and some lung cancers, and is not detected in normal tissues. EGFRvIII plays a critical role in tumorigenesis, disease progression, and metastasis, and is recognized as a cancer driver mutation in glioblastoma. Its expression is associated with poor prognosis, making EGFRvIII an ideal target for immunotherapy. References:
 1. Yang J., et al. Cancer Lett. 2017;403:224-30.
 2. Jungbluth A.A., et al. PNAS. 2003;100:639-644.
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      | Quality Control | 
          Fig. A: Flow cytometry assay demonstrating cell binding specificity. U87 cells (EGFRvIII negative), U87 (EGFR++), and U87 (EGFRvIII++) cells were stained with 5 µg antibody in 1 mL PBS containing 5% BSA. Binding was detected with a Cy5-conjugated goat anti-rabbit antibody. Shaded area: isotype control; red line: EGFRvIII antibody staining.Fig. B: ELISA assay demonstrating target specificity. Recombinant EGFR-hFc (negative control), EGFRvIII-hFc (target), and BSA were immobilized at 5 µg/mL. Biotinylated antibody (1:2 serial dilutions from 200 nM) was incubated at 37 °C for 30 min. Binding was visualized with HRP-conjugated streptavidin.
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      | Concentration | As indicated on the vial label | 
    
      | Formulation | 80% PBS, pH 7.4; 20% glycerol; 5% trehalose; 0.04% sodium azide (preservative) | 
    
      | Shipping | Shipped on blue ice | 
    
      | Storage | Store at -20 to -70 °C (long-term), or at 4 °C for up to one week. For frequent use, aliquot to avoid repeated freeze-thaw cycles.
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