| 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 conditions
 
          - Purified by Protein A affinity chromatography
 
          - High batch-to-batch consistency and reproducibility
 
          - Long-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 concentration
 
          - Immunoprecipitation: 10 µg per 0.3–0.5 mg cell lysate
 
          - Western 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.
       | 
    
    
      | 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.
         
       | 
    
    
      | 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.
       |