Anti-CD21 Antibody

Cat: 10811-MM02
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All CD21 Reagents
Anti-CD21 Antibody (Mouse Monoclonal antibody) General Information
Product name
Anti-CD21 Antibody
Validated applications
Species reactivity
Reacts with: Human
Human CD21
Recombinant Human CD21 Protein (Catalog#10811-H08H)
This antibody was produced from a hybridoma resulting from the fusion of a mouse myeloma with B cells obtained from a mouse immunized with purified, recombinant Human CD21 (rh CD21; Catalog#10811-H08H; P20023-1; Met1-Arg971). The IgG fraction of the cell culture supernatant was purified by Protein A affinity chromatography.
Monoclonal Mouse IgG1 Clone #02
Protein A
0.2 μm filtered solution in PBS
This antibody is shipped as liquid solution at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
This antibody can be stored at 2℃-8℃ for one month without detectable loss of activity. Antibody products are stable for twelve months from date of receipt when stored at -20℃ to -80℃. Preservative-Free. Sodium azide is recommended to avoid contamination (final concentration 0.05%-0.1%). It is toxic to cells and should be disposed of properly. Avoid repeated freeze-thaw cycles.
Anti-CD21 Antibody (Mouse Monoclonal antibody) Validated Applications
Application Dilution Notes
ELISA 1:1000-1:2000  
FCM 1:25-1:100  

**********Please Note: Optimal concentrations/dilutions should be determined by the end user.**********

Anti-CD21 Antibody (Mouse Monoclonal antibody) Images
Human CD21 Flow Cytometry (FC) 5286
Flow cytometric analysis of Human CD21 expression on human whole blood lymphocytes. Cells were stained with purified anti-Human CD21, then a FITC-conjugated second step antibody. The fluorescence histograms were derived from gated events with the forward and side light-scatter characteristics of viable lymphocytes.
Anti-CD21 Antibody Alternative Names
Anti-C3DR Antibody;Anti-CD21 Antibody;Anti-CR Antibody;Anti-CVID7 Antibody;Anti-SLEB9 Antibody
CD21 Background Information

The cluster of differentiation (CD) system is commonly used as cell markers in immunophynotyping. Different kinds of cells in the immune system can be identified through the surface CD molecules which associating with the immune function of the cell. There are more than 320 CD unique clusters and subclusters have been identified. Some of the CD molecules serve as receptors or ligands important to the cell through initiating a signal cascade which then alter the behavior of the cell. Some CD proteins do not take part in cell signal process but have other functions such as cell adhesion. CD21, also known as Complement component (3d / Epstein Barr virus) receptor 2 and CR2, is a member of the CD system and is a protein involved in complement system. CD21 is present on all mature B-cells and some T-cells and follicular dendritic cells. CD21 on mature B-cells form a complex called the B cell receptor complex with two other membrane proteins, CD19 and CD81. CD21 has a function in the complement system through serving as the cellular receper specific for ligands such as C3 and C4 which can be attached to foreign macromolecules in order to remove or uptake them. This results in B-cells having enhanced response to the antigen.

Full Name
complement component (3d/Epstein Barr virus) receptor 2
  • Zola H, et al. (2007) CD molecules 2006-human cell differentiation molecules. J Immunol Methods. 318 (1-2): 1-5.
  • Ho IC, et al. (2009) GATA3 and the T-cell lineage: essential functions before and after T-helper-2-cell differentiation. Nat Rev Immunol. 9 (2): 125-35.
  • Matesanz-Isabel J, et al. (2011) New B-cell CD molecules. Immunology Letters.134 (2): 104-12.
  • Joseph M, et al. (1989) Structure and Function of the Complement Receptors, CR1 (CD35) and CR2 (CD21). Advanced in immunology. 46: 183-219.
  • Aubry JP, et al. (1992) CD21 is a ligand for CD23 and regulates IgE production. Nature 358: 505 - 7.
  • Product Description Host Clonality Application Catalog# (PDF)
    Anti-CD21 Antibody Rabbit Monoclonal ELISA,ELISA(Det) 10811-R001
    Anti-CD21 Antibody (FITC) Mouse Monoclonal FCM 10811-MM02-F
    Anti-CD21 Antibody (FITC) Rabbit Monoclonal FCM 10811-R257-F
    Anti-CD21 Antibody Rabbit Polyclonal WB,ELISA,IHC-P,IP 10811-RP02
    Anti-CD21 Antibody Rabbit Monoclonal ELISA,IHC-P 10811-R005
    Anti-CD21 Antibody (APC) Rabbit Monoclonal FCM 10811-R257-A
    Anti-CD21 Antibody Rabbit Monoclonal FCM 10811-R257
    Anti-CD21 Antibody Rabbit Polyclonal WB,ELISA,IHC-P,IP 10811-T60
    Anti-CD21 Antibody (APC) Mouse Monoclonal FCM 10811-MM02-A
    Anti-CD21 Antibody (PE) Mouse Monoclonal FCM 10811-MM02-P
    Anti-CD21 Antibody Mouse Monoclonal ELISA,ELISA(Cap) 10811-MM11
    Anti-CD21 Antibody Mouse Monoclonal IHC-P 10811-MM28
    Anti-CD21 Antibody Rabbit Monoclonal ELISA(Cap) 10811-R019
    Anti-CD21 Antibody (PE) Rabbit Monoclonal FCM 10811-R257-P
    Anti-CD21 Antibody Rabbit Polyclonal ELISA 10811-RP01
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