Date published: 2026-8-27

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CD22 Antibody (4KB128): sc-20053

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Datasheets
  • CD22 Antibody (4KB128) is a mouse monoclonal IgG1 κ provided at 200 µg/ml
  • raised against human neoplastic cells from a case of hairy cell leukemia
  • recommended for detection of CD22 of human origin by IF and FCM
  • available conjugated to either phycoerythrin or FITC for IF, IHC(P) and FCM
  • m-IgG Fc BP-HRP is the preferred secondary detection reagent for CD22 Antibody (4KB128). This reagent is now offered in a bundle with CD22 Antibody (4KB128) (see ordering information below).
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    CD22 Antibody (4KB128) is a mouse monoclonal IgG1 antibody that detects CD22 in human samples through immunofluorescence (IF) and flow cytometry (FCM) applications. CD22 is a critical regulator of B cell signaling and plays a vital role in the immune response by modulating B cell activation and proliferation. This integral membrane glycoprotein, also known as B-lymphocyte cell adhesion molecule (BLCAM) and sialic acid-binding Ig-like lectin 2 (Siglec-2), is predominantly expressed on the surface of B lymphocytes, where CD22 functions to maintain B cell homeostasis and prevent excessive activation. CD22 exists in two main isoforms, CD22α and CD22β, resulting from alternative splicing, with CD22β being the more prevalent form. CD22 presence on mature B cells is crucial for their differentiation into plasma cells, and CD22 cytoplasmic form serves as a significant marker for acute lymphocytic leukemia, highlighting CD22′s importance in both normal immune function and disease states. Anti-CD22 antibody (4KB128) is an essential tool for researchers studying B cell biology and related pathologies, providing insights into the mechanisms of B cell regulation and potential therapeutic targets.

    For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

    Alexa Fluor® is a trademark of Molecular Probes Inc., OR., USA

    LI-COR® and Odyssey® are registered trademarks of LI-COR Biosciences

    CD22 Antibody (4KB128) References:

    1. CD22: a multifunctional receptor that regulates B lymphocyte survival and signal transduction.  |  Tedder, TF., et al. 2005. Adv Immunol. 88: 1-50. PMID: 16227086
    2. Targeting B lymphoma with nanoparticles bearing glycan ligands of CD22.  |  Chen, WC., et al. 2012. Leuk Lymphoma. 53: 208-10. PMID: 21756025
    3. CD22 monoclonal antibody therapies in relapsed/refractory acute lymphoblastic leukemia.  |  Hoelzer, D. 2013. Cancer. 119: 2671-4. PMID: 23633448
    4. CD22 and Siglec-G regulate inhibition of B-cell signaling by sialic acid ligand binding and control B-cell tolerance.  |  Nitschke, L. 2014. Glycobiology. 24: 807-17. PMID: 25002414
    5. N-Linked Glycosylation Regulates CD22 Organization and Function.  |  Wasim, L., et al. 2019. Front Immunol. 10: 699. PMID: 31019513
    6. Coordinated roles for glycans in regulating the inhibitory function of CD22 on B cells.  |  Enterina, JR., et al. 2019. Biomed J. 42: 218-232. PMID: 31627864
    7. Upregulation of CD22 by Chidamide promotes CAR T cells functionality.  |  Yang, X., et al. 2021. Sci Rep. 11: 20637. PMID: 34667217
    8. Associations of plasma soluble CD22 levels with brain amyloid burden and cognitive decline in Alzheimer's disease.  |  Bu, XL., et al. 2022. Sci Adv. 8: eabm5667. PMID: 35363517
    9. CD19/CD22 CAR-T-cell cocktail therapy following autologous transplantation is an optimizing strategy for treating relapsed/refractory central nervous system lymphoma.  |  Zhou, X., et al. 2024. Exp Hematol Oncol. 13: 100. PMID: 39397022
    10. Inotuzumab Ozogamicin and Low-Intensity Chemotherapy in Older Patients With Newly Diagnosed CD22+ Philadelphia Chromosome-Negative B-Cell Precursor Acute Lymphoblastic Leukemia.  |  Chevallier, P., et al. 2024. J Clin Oncol. 42: 4327-4341. PMID: 39418626

    Ordering Information

    Product NameCatalog #UNITPriceQtyFAVORITES

    CD22 Antibody (4KB128)

    sc-20053
    200 µg/ml
    $322.00

    CD22 Antibody (4KB128): m-IgG Fc BP-HRP Bundle

    sc-552833
    200 µg Ab; 10 µg BP
    $361.00

    CD22 Antibody (4KB128) FITC

    sc-20053 FITC
    200 µg/ml
    $336.00

    CD22 Antibody (4KB128) PE

    sc-20053 PE
    200 µg/ml
    $349.00

    How can CD22 (4KB128): sc-20053 mouse monoclonal antibody be used for double or triple staining, if the other primary antibodies are also raised in mouse?

    Asked by: Randy McDonald
    In this case, we recommend using a directly conjugated mouse monoclonal primary antibody. This antibody is available conjugated to phycoerythrin (sc-20053 PE) or fluoroscein (sc-20053 FITC).
    Answered by: Technical Support
    Date published: 2017-03-01
    • y_2026, m_8, d_26, h_8CST
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    Rated 4 out of 5 by from Great immunofluorescence membrane stainingGreat immunofluorescence membrane staining in methanol-fixed BJAB cells. -SCBT QC
    Date published: 2015-02-26
    Rated 4 out of 5 by from Wonderful FCM data of human peripheral bloodWonderful FCM data of human peripheral blood leukocytes. -SCBT QC
    Date published: 2013-09-05
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    CD22 Antibody (4KB128) is rated 4.0 out of 5 by 2.
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