Name: Recombinant Streptavidin, His Tag
Price: Inquiry

- Overview
  - Recombinant Streptomyces Avidinii Streptavidin produced in E. Coli is a single, non-glycosylated polypeptide chain (25-183) containing a total of 167 amino acids and having a molecular mass of 17kDa. The Streptavidin protein is fused to an 8 aa N-terminal His-Tag and purified by proprietary chromatographic techniques. Streptavidin is a tetrameric protein secreted by Streptomyces avidinii which binds firmly to biotin. Streptavidin is widely used in molecular biology through its unique high affinity for the vitamin biotin. The dissociation constant (Kd) of the biotin-streptavidin complex is about ~10-15 mol/L. The strong affinity recognition of biotin and biotinylated molecules has made streptavidin one of the most important components in diagnostics and laboratory kits. The streptavidin/biotin system has one of the biggest free energies of association of yet observed for noncovalent binding of a protein and small ligand in aqueous solution (K_assoc = 10**14). The complexes are also extremely stable over a wide range of temperature and pH.
    
    Please contact us at for specific academic pricing.
- Properties
  - Source
    
    E. coli
    
    Type
    
    Recombinant Proteins
    
    Purification
    
    Greater than 95.0% as determined by analysis by SDS-PAGE.
    
    Formulation
    
    The Streptavidin protein solution contains 20mM Tris-HCl pH7.5.
    
    Storage
    
    Store at 4°C if entire vial will be used within 2-4 weeks. Store, frozen at -20°C for longer periods of time. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Avoid multiple freeze-thaw cycles.
    
    * For Research Use Only. Not for use in diagnostic/therapeutics procedures.

Recombinant Streptavidin, His Tag

Recombinant Streptavidin, His Tag

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