Streptavidin Protein-FITC

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Cat. No. / Size
Price
Qty
STN-NF113-200ug
$60.00
STN-NF113-1mg (500ug X 2)
$135.00
ETA of in-stock products:2 business days

Product Details

  • Synonyms

    Streptavidin, SA

  • Source

    Streptavidin Protein-FITC (STN-NF113) is expressed from E. coli cells.

  • Molecular Characterization

    This protein carries no "tag".

    The protein has a calculated MW of 13.8 kDa.

  • Conjugate

    FITC

    Excitation source: 488 nm spectral line, argon-ion laser

    Excitation Wavelength: 488 nm

    Emission Wavelength: 535 nm

  • Labeling

    The primary amines in the side chains of lysine residues and the N-terminus of the protein are conjugated with FITC using standard chemical labeling method. The residual FITC is removed by molecular sieve treatment during purification process.

  • Protein Ratio

    The FITC to protein molar ratio is 3-6.

  • Application

    Flow Cytometry

  • Purity

    >90% as determined by SDS-PAGE.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.

    Contact us for customized product form or formulation.

  • Reconstitution

    Please see Certificate of Analysis for specific instructions.

    For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

  • Storage

    For long term storage, the product should be stored at lyophilized state at -20°C or lower.

    Please protect from light and avoid repeated freeze-thaw cycles.

    This product is stable after storage at:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
  • ACRO Quality Management System

    1. QMS(ISO, GMP)
    2. Quality Advantages
    3. Quality Control Process

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Performance Data

  • Bioactivity-FACS

     Streptavidin FACS

    5e5 of Anti-CD19 CAR-293 cells were stained with 100 μL of 20 μg/mL Biotinylated Human CD19 (20-291) Protein, Fc,Avitag, premium grade (Cat. No. CD9-H82F6) and negative control protein respectively, washed and then followed with 1.25 μg/mL of Streptavidin Protein-FITC (Cat. No. STN-NF113) and analyzed with FACS. FITC signal was used to evaluate the binding activity (QC tested).

    Protocol

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Background

Streptavidin is a tetrameric protein purified from the bacterium Streptomyces avidinii, and exhibits high binding affinity for biotin. Able to bind one molecule of biotin with each subunit. Streptavidin (PI=6.0-7.5) has lower level of non-specific binding to various biological components at physiological pH than avidin (PI=7.4), resulting from its isoelectric point (PI).Streptavidin is useful in affinity chromatography, ELISA, immunohistochemistry and Western Blotting.

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