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Long name
Mouse Monoclonal Antibody against Human CD20, Clone: LT20
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Antigen
CD20
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Species reactivity
Human (Homo sapiens)
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Negative species reactivity
at the time of upload there has been no data, please, contact us to obtain most recent information on species reactivity and cross reactivity
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Clonality
Monoclonal Antibody (Mab)
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Clone
LT20
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Applications
FC
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Immunogen
Normal human lymphocytes from lymph node.
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Format conjugation
FITC
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Specificity
The antibody LT20 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.
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Research area
Calcium Signaling (Human), CD and Related Antigens (Human)
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Storage buffer
The reagent is provided in stabilizing phosphate buffered saline (PBS) solution containing 15mM sodium azide.
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Shipping and storage
Mouse Monoclonal Antibody against Human CD20, Clone: LT20 is transported on blue ice/ice packs and should be stored at temperatures between 1 and 5 degrees Celsius. Do not freeze! Avoid exposing the product to direct light, especially the conjugated antibodies as most conjugates are very sentitive to light.
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Background
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.
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Purity
> 95% (by SDS-PAGE)
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Purification method
Purified by affinity chromatography
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References
*Kanderova V, Kuzilkova D, Stuchly J, Vaskova M, Brdicka T, Fiser K, Hrusak O, Lund-Johansen F, Kalina T: High-resolution Antibody Array Analysis of Childhood Acute Leukemia Cells. Mol Cell Proteomics. 2016 Apr;15(4):1246-61., Všianská P, Říhová L, Varmužová T, Suská R, Kryukov F, Mikulášová A, Kupská R, Penka M, Pour L, Adam Z, Hájek R: Analysis of B-cell subpopulations in monoclonal gammopathies. Clin Lymphoma Myeloma Leuk. 2015 Apr;15(4):e61-71., *Filatov AV, Krotov GI, Zgoda VG, Volkov Y: Fluorescent immunoprecipitation analysis of cell surface proteins: a methodology compatible with mass-spectrometry. J Immunol Methods. 2007 Jan 30;319(1-2):21-33., *Leukocyte Typing VII., Mason D. et al. (Eds.), Oxford University Press (2002)., *Teeling JL, Mackus WJ, Wiegman LJ, van den Brakel JH, Beers SA, French RR, van Meerten T, Ebeling S, Vink T, Slootstra JW, Parren PW, Glennie MJ, van de Winkel JG: The biological activity of human CD20 monoclonal antibodies is linked to unique epitopes on CD20. J Immunol. 2006 Jul 1;177(1):362-71. _x000D_ , *Polyak MJ, Deans JP: Alanine-170 and proline-172 are critical determinants for extracellular CD20 epitopes; heterogeneity in the fine specificity of CD20 monoclonal antibodies is defined by additional requirements imposed by both amino acid sequence and quaternary structure. Blood. 2002 May 1;99(9):3256-62. , *Chan HT, Hughes D, French RR, Tutt AL, Walshe CA, Teeling JL, Glennie MJ, Cragg MS: CD20-induced lymphoma cell death is independent of both caspases and its redistribution into triton X-100 insoluble membrane rafts. Cancer Res. 2003 Sep 1;63(17):5480-9. _x000D_
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Properties
If you buy Antibodies supplied by Exbio they should be stored frozen at - 24°C for long term storage and for short term at + 5°C.
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About
Monoclonals of this antigen are available in different clones. Each murine monoclonal anibody has his own affinity specific for the clone. Mouse monoclonal antibodies are purified protein A or G and can be conjugated to FITC for flow cytometry or FACS and can be of different isotypes.
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French translation
anticorps
