Human Siglec-2/CD22 Antibody

    
Datasheet / CoA / SDS
Product Details
FAQs
Supplemental Products
Reviews
  • Species Reactivity
    Human
  • Specificity
    Detects human Siglec-2 in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human Siglec-3, -5, -7, -9, -10, -F, or recombinant mouse Siglec‑11 is observed.
  • Source
    Monoclonal Mouse IgG1 Clone # 219934
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human Siglec-2/CD22
    Asp20-Arg687
    Accession # CAA42006
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Label
    Unconjugated
Product Datasheets

Certificate of Analysis Lookup

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Certificate of Analysis Lookup

Certificate of Analysis Request Form

To download a Certificate of Analysis, please enter the catalog and lot numbers in the search box below.

Note: Certificate of Analysis not available for kit components.

Applications
  •  
    Recommended
    Concentration
    Sample
  • Flow Cytometry
    0.25 µg/106 cells
    See below
  • CyTOF-ready
    Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
  • Immunocytochemistry
    8-25 µg/mL
    Immersion fixed human peripheral blood mononuclear cells
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Example
Detection of Siglec‑2/CD22 in Human PBMCs by Flow Cytometry. Human peripheral blood mononuclear cells (PBMCs) were stained with Mouse Anti-Human CD19 APC‑conjugated Monoclonal Antibody (Catalog # FAB4867A) and either (A) Mouse Anti-Human Siglec‑2/CD22 Monoclonal Antibody (Catalog # MAB1968) or (B) Mouse IgG1 Isotype Control (Catalog # MAB002) followed by Phycoerythrin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0102B). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.5 mg/mL in sterile PBS.
    Reconstitution Buffer Available
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Siglec-2/CD22

Siglecs (Sialic acid binding Ig-like Lectins) are I-type (Ig-type) lectins belonging to the Ig superfamily. They are characterized by an N-terminal V-type Ig-like domain which mediates sialic acid binding, followed by varying numbers of C2-type Ig-like domains (1, 2). Fourteen human Siglecs have been cloned and characterized. They are Sialoadhesin/CD169/Siglec-1, CD22/Siglec-2, CD33/Siglec-3, Myelin-Associated Glycoprotein (MAG/Siglec-4a), and the identified Siglecs 5 to 11, plus 14 to 16 (1-3). To date, no Siglec has been shown to recognize any cell surface ligand other than sialic acid, suggesting that interactions with glycans containing this carbohydrate are important in mediating the biological functions of Siglecs. Human Siglec-2, also known as B-cell antigen CD22 or B lymphocyte cell adhesion molecule (BL-CAM), is a B cell restricted glycoprotein that is expressed in the cytoplasm of progenitor B and pre-B cells and on the surface of mature B cells and intestinal eosinophils (3,4). Two distinct human Siglec-2/CD22 cDNAs that arise from differential RNA processing of the same gene have been isolated. The predominant Siglec-2/CD22 beta encodes an 847 amino acid (aa) polypeptide with a hydrophobic signal peptide, an V-type N-terminal Ig-like domain, six C2-type Ig-like domains, a transmembrane region and a cytoplasmic tail with 4 immunoreceptor tyrosine-based inhibition motifs (ITIMs) (5). The variant Siglec-2/CD22 alpha encodes a 647 aa polypeptide missing two C2-type Ig-like domains and has a truncated (23 aa) cytoplasmic tail (6). Siglec-2/CD22 is an adhesion molecule that preferentially binds alpha 2,6- linked sialic acid on the same (cis) or adjacent (trans) cells. Besides its role as an adhesion molecule, Siglec-2/CD22 is a coreceptor that physically interacts with B cell receptor (BCR) and is rapidly phosphorylated upon BCR ligation (3). It negatively regulates BCR signals by recruiting tyrosine phosphatase SHP-1 to its ITIMs, likely within large oligomeric complexes. Over aa 20-687, human and mouse share 59% aa sequence identity.

  • References:
    1. Magesh, S. et al. (2011) Curr. Med. Chem. 18:3537.
    2. Bocher, B.S.. and N. Zimmermann (2015) J. Allergy Clin. Immunol. 135:598.
    3. Nitschke, L. (2014) Glycobiology 24:807.
    4. Wen, T. et al. (2012) J. Immunol. 188:1075.
    5. Wilson, G.L et al. (1991) J. Exp. Med. 173:137.
    6. Stamenkovic, I. and B. Seed (1990) Nature 345:74.
  • Long Name:
    Sialic Acid Binding Ig-like Lectin 2
  • Entrez Gene IDs:
    933 (Human); 12483 (Mouse); 102130968 (Cynomolgus Monkey)
  • Alternate Names:
    B-cell receptor CD22; BL-CAM; B-lymphocyte cell adhesion molecule; CD22 antigenMGC130020; CD22 molecule; CD22; sialic acid binding Ig-like lectin 2; Sialic acid-binding Ig-like lectin 2; Siglec2; Siglec-2; SIGLEC2FLJ22814; T-cell surface antigen Leu-14
Related Research Areas

FAQs

No product specific FAQs exist for this product, however you may

View all Antibody FAQs
Cell and Tissue Staining Kits
Description Application Cat# Citations Images  

Anti-Mouse HRP-DAB Cell & Tissue Staining Kit

CTS002 15
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG1 Isotype Control

Ctrl MAB002 148  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse IgG1 Isotype Control

Ctrl MAB002R 1
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Reconstitution Buffers
Description Application Cat# Citations Images  

Reconstitution Buffer 1 (PBS)

RB01
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Secondary Antibodies
Description Application Cat# Citations Images  

Mouse IgG HRP-conjugated Antibody

WB HAF007 32  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse F(ab)2 IgG (H+L) PE-conjugated Antibody

Flow F0102B 12  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Donkey Anti-Mouse IgG NorthernLights™ NL557-conjugate Antibody

Flow , IHC , ICC NL007 10
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse IgG HRP-conjugated Antibody

WB HAF018 9  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Donkey Anti-Mouse IgG NorthernLights™ NL637-conjugated Antibody

Flow , IHC , ICC NL008 8
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse F(ab)2 IgG (H+L) APC-conjugated Antibody

Flow F0101B 4  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Donkey Anti-Mouse IgG Biotinylated Antibody

WB BAF018 1
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse IgG Antibody

WB AF007 4
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Donkey Anti-Mouse IgG NorthernLights™ NL493-conjugated Antibody

Flow , IHC , ICC NL009 5
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse F(ab)2 IgG (H+L) Fluorescein-conjugated Antibody

Flow F0103B 5  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Goat Anti-Mouse IgG Biotinylated Antibody

WB BAF007 4
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse/Rabbit IgG VisUCyte HRP Polymer Antibody

IHC VC002  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse IgG VisUCyte HRP Polymer Antibody

IHC VC001  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Mouse F(ab)2 IgG (H+L) PerCP-conjugated Antibody

Flow F0114  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Have you used Human Siglec-2/CD22 Antibody?

Submit a review and receive a $25US/€18/£15/$25CAN amazon gift card if you include an image - $10US/€7/£6/$10CAN Amazon card for reviews without an image. Limited to verified customers in USA, Canada and Europe.

Order Details

Contact Us to Order
reload

Feedback

Customer Information
Calculators

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

=
÷

Monoclonal
Antibody
Panels For
Screening

Learn More
Monoclonal Antibodies
R&D Systems Guarantee