PE-Labeled Human Siglec-2 / CD22 Protein, His TagStar Staining

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Cat. No. / Size
Price
Qty
SI2-HP2H5-25tests
$415.00
SI2-HP2H5-200tests
$2695.00
ETA of in-stock products:2 business days

Product Details

  • Synonyms

    CD22, SIGLEC2, BL-CAM, SIGLEC-2, Siglec2, SIGLEC2FLJ22814

  • Source

    PE-Labeled Human Siglec-2, His Tag (SI2-HP2H5) is produced via conjugation of PE to Human Siglec-2, His Tag with a new generation site-specific technology under Star Staining labeling platform. Human Siglec-2, His Tag is expressed from human 293 cells (HEK293). It contains AA Asp 20 - Arg 687 (Accession # P20273-1).

    Predicted N-terminus: Asp 20

    Request for sequence

  • Molecular Characterization

    Siglec-2 Structure

    Other Tags and Version Biotin & Other Labeled Version

    This protein carries a polyhistidine tag at the C-terminus.

  • Conjugate

    PE

    Excitation Wavelength: 488 nm / 561 nm

    Emission Wavelength: 575 nm

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS, 0.2% BSA, 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

  • Evaluation of CAR expression

    FACS Analysis of Anti-Siglec-2 CAR Expression

     Siglec-2 CAR_T

    5e5 of anti-CD22 CAR-293 cells were stained with 100 μL of 1:50 dilution (2 μL stock solution in 100 μL FACS buffer) PE-Labeled Human Siglec-2, His Tag (Cat. No. SI2-HP2H5) and negative control protein respectively (Fig. C and B), and non-transfected 293 cells were used as a control (Fig. A). PE signal was used to evaluate the binding activity (QC tested).

    Protocol
  • FACS Analysis of Non-specific binding to PBMCs

     Siglec-2 CAR_T

    5e5 of PBMCs were stained with PE-Labeled Human Siglec-2, His Tag (Cat. No. SI2-HP2H5) and anti-CD3 antibody, washed and then analyzed with FACS. FITC signal was used to evaluate the expression of CD3+ T cells in PBMCs, and PE signal was used to evaluate the non-specific binding activity to PBMCs (QC tested).

    Protocol

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Background

B-cell receptor CD22 is also known as Sialic acid-binding Ig-like lectin 2 (Siglec-2), B-lymphocyte cell adhesion molecule (BL-CAM), T-cell surface antigen Leu-14, which belongs to the immunoglobulin superfamily and SIGLEC (sialic acid binding Ig-like lectin) family. CD22 mediates B-cell B-cell interactions, and may be involved in the localization of B-cells in lymphoid tissues. Siglec-2 / CD22 binds sialylated glycoproteins, one of which is CD45. Siglec2 / CD22 plays a role in positive regulation through interaction with Src family tyrosine kinases and may also act as an inhibitory receptor by recruiting cytoplasmic phosphatases via their SH2 domains that block signal transduction through dephosphorylation of signaling molecules.

Recent Advances

 
Drug Development Progress
  • English Name:

    CD22

  • Category:

  • Approved Drugs:

    2 Details

  • Drugs in Clinical Trials:

    73 Details

  • Highest Development Stage:

    Approved

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  • Background