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Mouse Monoclonal to CD20

MEM-269 (IgM)

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  11-483-C025 purified 0.025 mg yes choose region PDF datasheetHTML datasheet buy
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CD20 is a cell surface 33-37 (depending on the degree of phosphorylation) kDa non-glycosylated surface phosphoprotein expressed on mature and most malignant B cells, but not stem cells or plasma cells (low number of the CD20 has been also detected on a subpopulation of T lymphocytes and it can be expressed on follicular dendritic cells). Its expression on B cells is synchronous with the expression of surface IgM. CD20 regulates transmembrane calcium conductance (probably functioning as a component of store-operated calcium channel), cell cycle progression and B-cell proliferation. It is associated with lipid rafts, but the intensity of this association depends on extracellular triggering, employing CD20 conformational change and/or BCR (B cell antigen receptor) aggregation. After the receptor ligation, BCR and CD20 colocalize and then rapidly dissociate before BCR endocytosis, whereas CD20 remains at the cell surface. CD20 serves as a useful target for antibody-mediated therapeutic depletion of B cells, as it is expressed at high levels on most B-cell malignancies, but does not become internalized or shed from the plasma membrane following mAb treatment.


The antibody MEM-269 reacts with CD20 (Bp35), a 33-37 kDa non-glycosylated membrane receptor with four transmembrane domains, expressed on B lymphocytes (it is lost on plasma cells), follicular dendritic cells, and at low levels on peripheral blood T lymphocytes.

Regulatory Status


RAMOS human lymphoma cell line

Species Reactivity:

  • Human

Negative Species:


  • Flow Cytometry
    Recommended dilution:4 μg/ml
  • Immunohistochemistry (paraffin sections)
Usage note:
Indicated dilutions are recommended starting points for use of this product. Working concentrations should be determined by the investigator.


  • Unpublished.
  • For research use only. Not for drug, diagnostic or other use.

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