| Reactivity | HuSpecies Glossary |
| Applications | IHC |
| Clone | 544411 |
| Clonality | Monoclonal |
| Host | Mouse |
| Conjugate | Unconjugated |
| Immunogen | Chinese hamster ovary cell line CHO-derived recombinant human CD21 Ile21-Arg971 Accession # P20023 |
| Specificity | Detects human CD21 in direct ELISA. |
| Source | N/A |
| Isotype | IgG1 |
| Clonality | Monoclonal |
| Host | Mouse |
| Purity Statement | Protein A or G purified from hybridoma culture supernatant |
| Innovator's Reward | Test in a species/application not listed above to receive a full credit towards a future purchase. |
| Storage | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
|
| Buffer | Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS. |
| Reconstitution Instructions | Reconstitute at 0.5 mg/mL in sterile PBS. |
CD21 (also called EBV receptor or CR2) is a 145 kDa member of the RCA (receptors of complement activation) family of proteins. It is expressed on T cells, B cells, and follicular dendritic cells. On the B cell surface, it combines with the BCR and CD19 to form a B cell activating complex. Mature human CD21 is 1013 amino acids (aa) in length. It is a type I transmembrane (TM) protein that contains a 951 aa extracellular domain (ECD) (aa 21-971) and a short 34 aa cytoplasmic tail. The ECD exhibits fifteen 60 aa SUSHI repeats. Soluble CD21 can be generated by cleavage near the TM domain. One potential splice variant shows a deletion of aa 847‑908, while another shows an insertion of 59 aa after Lys659. The ECD of human CD21 shares 71% aa identity with mouse CD21 ECD.
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Secondary Antibodies |
Isotype Controls |
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How To Identify B Cell Subsets Using Flow Cytometry By Victoria OsinskiUsing Flow Cytometry to Identify B Cell SubsetsIdentifying cellular subsets by flow cytometry requires careful and thorough planning in order to ensure the correct subset of cells are identified... Read full blog post. |
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CD19: An Undoubted Biomarker for B Cells CD19 is a cell surface protein member of the large immunoglobulin superfamily that complexes with CD21, CD81, and CD225 in the membrane of mature B-cells. A major function of CD19 is to assemble with the antigen receptor of B-lymphocytes to decrease t... Read full blog post. |
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