• Product nameAnti-CD21 antibody [LT21] (FITC)
    See all CD21 primary antibodies
  • Description
    Mouse monoclonal [LT21] to CD21 (FITC)
  • ConjugationFITC. Ex: 493nm, Em: 528nm
  • Tested applicationsSuitable for: Flow Cytmore details
  • Species reactivity
    Reacts with: Cow, Human, Pig
  • Immunogen

    IM9 human B-lymphoblastoid cell line.

  • General notes

    CD21 is expressed on B lymphocytes, follicular dendritic cells, some epithelial cells and a subsets of T lymphocytes. It is not expressed on immature B cells.


  • FormLiquid
  • Storage instructionsShipped at 4°C. Store at +4°C.
  • Storage bufferPreservative: 15mM Sodium Azide
    Constituents: 0.2% BSA, PBS
  • Concentration information loading...
  • PuritySize exclusion
  • Purification notes>95% pure (by SDS Page).
  • Primary antibody notesCD21 is expressed on B lymphocytes, follicular dendritic cells, some epithelial cells and a subsets of T lymphocytes. It is not expressed on immature B cells.
  • ClonalityMonoclonal
  • Clone numberLT21
  • IsotypeIgG1
  • Research areas


Our Abpromise guarantee covers the use of ab65809 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
Flow Cyt Use 20µl for 106 cells.

Use 20µl for 106 cells or 100µl of whole blood.

ab91356-Mouse monoclonal IgG1, is suitable for use as an isotype control with this antibody.


  • FunctionReceptor for complement C3Dd, for the Epstein-Barr virus on human B-cells and T-cells and for HNRPU. Participates in B lymphocytes activation.
  • Tissue specificityMature B-lymphocytes, T-lymphocytes, pharyngeal epithelial cells, astrocytes and follicular dendritic cells of the spleen.
  • Involvement in diseaseGenetic variations in CR2 are associated with susceptibility to systemic lupus erythematosus type 9 (SLEB9) [MIM:610927]. Systemic lupus erythematosus (SLE) is a chronic autoimmune disease with a complex genetic basis. SLE is an inflammatory, and often febrile multisystemic disorder of connective tissue characterized principally by involvement of the skin, joints, kidneys, and serosal membranes. It is thought to represent a failure of the regulatory mechanisms of the autoimmune system.
  • Sequence similaritiesBelongs to the receptors of complement activation (RCA) family.
    Contains 15 Sushi (CCP/SCR) domains.
  • Cellular localizationMembrane.
  • Information by UniProt
  • Database links
  • Alternative names
    • C3DR antibody
    • CD 21 antibody
    • CD21 antibody
    • Complement C3d receptor 2 antibody
    • Complement C3d receptor antibody
    • Complement component (3d/Epstein Barr virus) receptor 2 antibody
    • Complement receptor type 2 antibody
    • CR antibody
    • Cr2 antibody
    • CR2_HUMAN antibody
    • CVID7 antibody
    • EBV receptor antibody
    • EBV-R antibody
    • Epstein Barr virus receptor antibody
    • Epstein-Barr virus receptor antibody
    • EVBR antibody
    • SLEB9 antibody
    see all

References for Anti-CD21 antibody [LT21] (FITC) (ab65809)

ab65809 has not yet been referenced specifically in any publications.

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