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Immunocytochemistry (ICC) (ICC staining CD21 in LOVO cells (green). The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.)

Rabbit anti-Human CD21 Polyclonal Antibody | anti-CD21 antibody

CD21 Polyclonal Antibody

Gene Names
CR2; CR; C3DR; CD21; CVID7; SLEB9
Reactivity
Human
Applications
Immunocytochemistry, Immunohistochemistry, Flow Cytometry, Functional Assay
Purity
Peptide affinity purified.
Synonyms
CD21; Polyclonal Antibody; CD21 Polyclonal Antibody; Cr2; EBV receptor; CR2; C3DR; CD 21; Complement C3d receptor 2; Complement C3d receptor; Complement component (3d/Epstein Barr virus) receptor 2; Complement receptor type 2; CR; CVID7; EBV-R; Epstein Barr virus receptor; Epstein-Barr virus receptor; EVBR; SLEB9; anti-CD21 antibody
Ordering
For Research Use Only!
Host
Rabbit
Reactivity
Human
Clonality
Polyclonal
Isotype
IgG
Specificity
CD21 polyclonal antibody detects endogenous levels of CD21 protein.
Purity/Purification
Peptide affinity purified.
Form/Format
Rabbit IgG, 1mg/ml in PBS with 0.02% sodium azide, 50% glycerol, pH7.2
Sequence Length
1033
Applicable Applications for anti-CD21 antibody
Immunocytochemistry (ICC), Immunohistochemistry (IHC), Flow Cytometry (FC/FACS)
Application Notes
IHC: 1:50-1:200
ICC: 1:50-1:200
FC/FACS: 1:50-1:100
Immunogen
Peptide.
Preparation and Storage
Store at 4 degree C after thawing.
Aliquot store at -20 degree C or -80 degree C.
Avoid repeated freeze/thaw cycles.

Immunocytochemistry (ICC)

(ICC staining CD21 in LOVO cells (green). The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.)

Immunocytochemistry (ICC) (ICC staining CD21 in LOVO cells (green). The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.)

Immunocytochemistry (ICC)

(ICC staining CD21 in SH-SY5Y cells (green). The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.)

Immunocytochemistry (ICC) (ICC staining CD21 in SH-SY5Y cells (green). The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.)
Related Product Information for anti-CD21 antibody
CD21 (also known as complement receptor (CR) type 2) is a type I integral membrane glycoprotein that serves as a receptor for the C3d complement fragment and for the Epstein-Barr virus. It plays a role in B cell activation and proliferation and undergoes phosphorylation after B cell activation with phorbol esters. CD21 is expressed on mature B cells, follicular dendritic cells, pharyngeal and cervical epithelial cells and a subset of thymocytes. The adaptive immune response is tightly regulated to limit responding cells in an antigen-specific manner. On B cells, co-receptors CD21/CD19 modulate the strength of B cell Ag receptor (BCR) signals, thereby influencing cell fate. CD21 is normally expressed during the immature and mature stages of B cell development. In association with CD19, CR21 plays an important role in enhancing mature B cell responses to foreign antigens.

NCBI and Uniprot Product Information

NCBI GI #
NCBI GeneID
UniProt Accession #
NCBI Official Full Name
Complement receptor type 2
NCBI Official Synonym Full Names
complement C3d receptor 2
NCBI Official Symbol
CR2
NCBI Official Synonym Symbols
CR; C3DR; CD21; CVID7; SLEB9
NCBI Protein Information
complement receptor type 2
UniProt Protein Name
Complement receptor type 2
UniProt Gene Name
CR2
UniProt Synonym Gene Names
C3DR; Cr2; EBV receptor
UniProt Entry Name
CR2_HUMAN

NCBI Description

This gene encodes a membrane protein, which functions as a receptor for Epstein-Barr virus (EBV) binding on B and T lymphocytes. Genetic variations in this gene are associated with susceptibility to systemic lupus erythematosus type 9 (SLEB9). Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Sep 2009]

Uniprot Description

CR2: Receptor for complement C3Dd, for the Epstein-Barr virus on human B-cells and T-cells and for HNRPU. Participates in B lymphocytes activation. Genetic variations in CR2 are associated with susceptibility to systemic lupus erythematosus type 9 (SLEB9). 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. Defects in CR2 are the cause of immunodeficiency, common variable, type 7 (CVID7). A primary immunodeficiency characterized by antibody deficiency, hypogammaglobulinemia, recurrent bacterial infections and an inability to mount an antibody response to antigen. The defect results from a failure of B-cell differentiation and impaired secretion of immunoglobulins; the numbers of circulating B cells is usually in the normal range, but can be low. Belongs to the receptors of complement activation (RCA) family. 4 isoforms of the human protein are produced by alternative splicing.

Protein type: Receptor, misc.; Membrane protein, integral

Chromosomal Location of Human Ortholog: 1q32

Cellular Component: plasma membrane; integral to membrane; receptor complex; external side of plasma membrane

Molecular Function: complement binding; protein homodimerization activity; transmembrane receptor activity; complement receptor activity; DNA binding

Biological Process: B cell proliferation; complement receptor mediated signaling pathway; B cell differentiation; innate immune response; immune response; complement activation, classical pathway

Disease: Systemic Lupus Erythematosus, Susceptibility To, 9; Immunodeficiency, Common Variable, 2; Immunodeficiency, Common Variable, 7

Research Articles on CD21

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Product Notes

The CD21 cr2 (Catalog #AAA3012400) is an Antibody produced from Rabbit and is intended for research purposes only. The product is available for immediate purchase. The CD21 Polyclonal Antibody reacts with Human and may cross-react with other species as described in the data sheet. AAA Biotech's CD21 can be used in a range of immunoassay formats including, but not limited to, Immunocytochemistry (ICC), Immunohistochemistry (IHC), Flow Cytometry (FC/FACS). IHC: 1:50-1:200 ICC: 1:50-1:200 FC/FACS: 1:50-1:100. Researchers should empirically determine the suitability of the CD21 cr2 for an application not listed in the data sheet. Researchers commonly develop new applications and it is an integral, important part of the investigative research process. It is sometimes possible for the material contained within the vial of "CD21, Polyclonal Antibody" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.

Precautions

All products in the AAA Biotech catalog are strictly for research-use only, and are absolutely not suitable for use in any sort of medical, therapeutic, prophylactic, in-vivo, or diagnostic capacity. By purchasing a product from AAA Biotech, you are explicitly certifying that said products will be properly tested and used in line with industry standard. AAA Biotech and its authorized distribution partners reserve the right to refuse to fulfill any order if we have any indication that a purchaser may be intending to use a product outside of our accepted criteria.

Disclaimer

Though we do strive to guarantee the information represented in this datasheet, AAA Biotech cannot be held responsible for any oversights or imprecisions. AAA Biotech reserves the right to adjust any aspect of this datasheet at any time and without notice. It is the responsibility of the customer to inform AAA Biotech of any product performance issues observed or experienced within 30 days of receipt of said product. To see additional details on this or any of our other policies, please see our Terms & Conditions page.

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