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CD21 Polyclonal antibody

CD21 Polyclonal Antibody for WB, IHC, ELISA

Host / Isotype

Rabbit / IgG

Reactivity

human

Applications

WB, IF, IHC, ELISA

Conjugate

Unconjugated

Cat no : 24374-1-AP

Synonyms

C3DR, CD21, Complement C3d receptor, Complement receptor type 2, CR2, EBV receptor, Epstein Barr virus receptor, SLEB9

Validation Data Gallery

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  • Western Blot (WB) analysis of various lysates using CD21 Polyclonal antibody (24374-1-AP)

    WB analysis using 24374-1-AP

    Various lysates were subjected to SDS PAGE followed by western blot with 24374-1-AP (CD21 antibody) at dilution of 1:600 incubated at room temperature for 1.5 hours.

  • Immunohistochemistry (IHC) staining of human tonsillitis tissue using CD21 Polyclonal antibody (24374-1-AP)

    IHC staining of human tonsillitis using 24374-1-AP

    Immunohistochemical analysis of paraffin-embedded human tonsillitis tissue slide using 24374-1-AP (CD21 antibody at dilution of 1:200 (under 10x lens). Heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0).

  • Immunohistochemistry (IHC) staining of human tonsillitis tissue using CD21 Polyclonal antibody (24374-1-AP)

    IHC staining of human tonsillitis using 24374-1-AP

    Immunohistochemical analysis of paraffin-embedded human tonsillitis tissue slide using 24374-1-AP (CD21 antibody at dilution of 1:200 (under 40x lens). Heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0).

Tested Applications

Positive WB detected inRaji cells
Positive IHC detected inhuman tonsillitis tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0

Recommended dilution

ApplicationDilution
Western Blot (WB)WB : 1:500-1:1000
Immunohistochemistry (IHC)IHC : 1:20-1:200
It is recommended that this reagent should be titrated in each testing system to obtain optimal results.
Sample-dependent, Check data in validation data gallery.

Product Information

24374-1-AP targets CD21 in WB, IF, IHC, ELISA applications and shows reactivity with human samples.

Tested Reactivity human
Cited Reactivityhuman
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen CD21 fusion protein Ag18058
Full Name complement component (3d/Epstein Barr virus) receptor 2
Calculated Molecular Weight 1092 aa, 119 kDa
Observed Molecular Weight145 kDa
GenBank Accession NumberBC136394
Gene Symbol CD21
Gene ID (NCBI) 1380
RRIDAB_2879512
Conjugate Unconjugated
Form Liquid
Purification MethodAntigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

CD21, also known as complement receptor type 2 (CR2), complement C3d receptor, and Epstein-Barr virus receptor, is a transmembrane protein that contains a small cytoplasmic domain, a transmembrane region and an extracellular domain consisting of 15 tandem short consensus repeat sequences (PMID: 6230668; 2551147). It is expressed on B cells, follicular dendritic cells, thymocytes and a subset of peripheral T cells (PMID: 26119182). CD21 binds complement fragments C3d, C3dg and iC3b and acts as a receptor for the Epstein-Barr virus (PMID: 7753047). On B cells, together with CD19 and CD81, CD21 forms a complex that functions as a co-receptor to the BCR (PMID: 7542009). It is involved in B cells activation and functions.

Protocols

Product Specific Protocols
WB protocol for CD21 antibody 24374-1-APDownload protocol
IHC protocol for CD21 antibody 24374-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols

Publications

SpeciesApplicationTitle
humanIF

Nat Commun

B cells sustain inflammation and predict response to immune checkpoint blockade in human melanoma.

Authors - Johannes Griss
View Article
humanIF

Clin Transl Med

Single-cell transcriptome sequencing of B-cell heterogeneity and tertiary lymphoid structure predicts breast cancer prognosis and neoadjuvant therapy efficacy

Authors - Qing Wang
View Article
humanIHC，IF

Front Immunol

A Standardized Analysis of Tertiary Lymphoid Structures in Human Melanoma: Disease Progression- and Tumor Site-Associated Changes With Germinal Center Alteration.

Authors - Franziska Werner
View Article