Streptavidin Protein-PE, premium grade

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Cat. No. / Size
Price
Qty
STN-NP117-100ug
$180.00
STN-NP117-500ug
$400.00
ETA of in-stock products:2 business days

Product Details

  • Synonym

    Streptavidin, SA

  • Source

    Streptavidin Protein-PE, premium grade (STN-NP117) is expressed from E. coli cells.

    It is produced under our rigorous quality control system that incorporates a comprehensive set of tests including sterility and endotoxin tests. Product performance is carefully validated and tested for compatibility for cell culture use or any other applications in the early preclinical stage. When ready to transition into later clinical phases, we also offer a custom GMP protein service that tailors to your needs. We will work with you to customize and develop a GMP-grade product in accordance with your requests that also meets the requirements for raw and ancillary materials use in cell manufacturing of cell-based therapies.

  • Molecular Characterization

    This protein carries no "tag".

  • Conjugate

    PE

    Excitation Wavelength: 488 nm / 561 nm

    Emission Wavelength: 575 nm

  • Application

    1. Fluorescence based flow cytometric cell sorting.

    2. Cell staining for flow cytometry analysis.

  • Endotoxin

    Less than 0.5 EU per μg by the LAL method / rFC method.

  • Sterility

    Negative

  • Mycoplasma

    Negative

  • Purity

    >90% as determined by SDS-PAGE.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS, 0.2 M NaCl, 15 mg/ml rHSA, 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 100μL 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 2.5 μg/mL of Streptavidin Protein-PE, premium grade (Cat. No. STN-NP117) and analyzed with FACS. PE signal was used to evaluate the binding activity (QC tested).

    Protocol
  • Bioactivity-Stability

     Streptavidin STABILITY

    5e5 of Anti-CD19 CAR-293 cells were stained with 100 μL of 20 μg/mL Biotinylated Human CD19 (20-291), Fc,Avitag, premium grade (Cat. No. CD9-H82F6) and negative control protein respectively, washed and then followed with 2.5 μg/mL of Streptavidin Protein-PE, premium grade (Cat. No. STN-NP117) and analyzed with FACS. PE signal was used to evaluate the binding activity.

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Background

The Streptavidin Protein Europium chelate is a universal tool for TR-FRET assays that can bind biotinylated molecules. This product uses high-purity streptavidin (SA) covalently conjugated with Eu³⁺ chelate, and it can be used in combination with other Acceptors directly or indirectly labeled with fluorescent dyes. When the Donor and Acceptor come into close proximity (within a distance of less than 10 nm), a FRET reaction occurs: the 620 nm signal emitted by the Donor upon excitation by a specific light source is received by the Acceptor, which then emits a 665 nm signal.

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  • Performance Data
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  • Background