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CD20 Antibody (757-0202-94) in IHC (P)
Immunohistochemical analysis of CD20 was performed on formalin-fixed paraffin-embedded human tonsil (positive) and human brain (negative) tissues. To expose the target protein, HIER was performed on de-paraffinized sections using BOND Epitope Retrieval Solution 2 (pH 9) for 10 min, followed by a 5 min cool down and a 1 min wash with ddH2O, and then transferred to 1X PBS. Tissues were permeabilized with 0.1%... View More
Product Details
757-0202-94
Applications
Tested Dilution
Publications
Product Specifications
Species Reactivity
Human
Host/Isotype
Mouse
/ IgG2a, kappa
Class
Monoclonal
Type
Antibody
Clone
L26
Conjugate
Excitation/Emission Max
760/788 nm
View spectra
Form
Liquid
Concentration
0.2 mg/mL
Amount
100 µg
Purification
Affinity chromatography
Storage buffer
PBS, pH 7.2, with 0.5% BSA, 10% proprietary stabilizer
Contains
0.05% sodium azide
Storage conditions
4°C, store in dark
Shipping conditions
Wet ice
RRID
Product Specific Information
Description: The monoclonal antibody L26 recognizes human CD20, a two transmembrane spanning protein found on precursor and mature B lymphocytes. Expression is lost upon differentiation to plasma cells. The levels of CD20 are critical in evaluating malignant B lymphocytes including Non-Hodgkin's Lymphoma, and Acute B cell, Chronic Lymphocytic and Hairy-Cell Leukemias. CD20 plays a role in B cell differentiation and activation. The structure of the protein shows a small extracellular loop with the carboxy and amino termini in the cytoplasmic compartment. The L26 antibody recognizes an epitope in the cytoplasmic domain and therefore requires permeabilization of the tissue for staining applications. Unlike many anti-CD20 antibodies that recognize the extracellular domain, the epitope recognized by L26 will not be blocked by therapeutic antibodies to CD20, like Rituximab.
Applications Reported: This L26 antibody has been reported for use in immunohistochemical staining of frozen and paraffin-embedded tissue (IHC-F, IHC-P), western blotting, and immunoprecipitation.
Applications Tested: This L26 antibody has been tested by immunohistochemical staining of human tissue using high pH antigen retrieval and can be used at 2 µg/mL. It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest.
It has been reported that the L26 antibody when used without antigen retrieval will detect a subpopulationof CD20-positive cells.
Using conjugate solutions: Centrifuge the protein conjugate solution briefly in a microcentrifuge before use; add only the supernatant to the experiment. This step will help eliminate any protein aggregates that may have formed during storage, thereby reducing nonspecific background staining.
Target Information
CD20 is a non-glycosylated surface phosphoprotein that has a molecular weight range of 33-37 kDa depending on the degree of phosphorylation. CD20 is expressed on mature and most malignant B cells, in a subpopulation of T lymphocytes and follicular dendritic cells. CD20 expression on B cells is synchronous with the expression of surface IgM and it regulates transmembrane calcium conductance, cell cycle progression and B-cell proliferation. CD20 is also 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 monoclonal antibody treatment. Diseases associated with CD20 dysfunction include Ms4a1-related common variable immune deficiency.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
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Bioinformatics
Protein Aliases: APY; ATOPY; B-lymphocyte antigen CD20; B-lymphocyte cell-surface antigen B1; B-lymphocyte surface antigen B1; Bp35; CD20; CD20 antigen; CD20 receptor; Fc epsilon receptor I beta chain; Fc Fragment of IgE high affinity I receptor for beta polypeptide; FCER1B; High affinity immunoglobulin epsilon receptor subunit beta; IgE Fc receptor subunit beta; IGEL; IGER; IGHER; LEU16; Leukocyte surface antigen Leu-16; Ly44; Membrane-spanning 4-domains subfamily A member 1; membrane-spanning 4-domains, subfamily A, member 1; MGC3969; unnamed protein product
Gene Aliases: B1; Bp35; CD20; CVID5; FMC7; LEU-16; MS4A1; S7
UniProt ID: (Human) P11836
Entrez Gene ID: (Human) 931
store-operated calcium entry
humoral immune response
cell surface receptor signaling pathway
response to bacterium
B cell differentiation
B cell proliferation
B cell activation
B cell receptor signaling pathway
protein tetramerization
calcium ion import into cytosol
positive regulation of calcium ion import across plasma membrane
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If an Invitrogen™ antibody doesn't perform as described on our website or datasheet,we'll replace the product at no cost to you, or provide you with a credit for a future purchase.*
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