Human Siglec-9 Biotinylated Antibody

(1 citations)   
  • Species Reactivity
    Human
  • Specificity
    Detects human Siglec‑9 in direct ELISAs and Western blots. In direct ELISAs, less than 0.2% cross-reactivity with recombinant human (rh) Siglec-2, rhSiglec-3, rhSiglec-5, rhSiglec-7, and rhSiglec-10 is observed. In Western blots, approximately 25% cross‑reactivity with rhSiglec-7 is observed, approximately 5% cross‑reactivity with rhSiglec-3 and rhSiglec-5 is observed, and less than 1% cross‑reactivity with rhSiglec-2 is observed.
  • Source
    Polyclonal Goat IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human Siglec-9
    Gln18-Gly348
    Accession # Q9Y336
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
  • Label
    Biotin
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    0.1 µg/mL
    Recombinant Human Siglec‑9 Fc Chimera (Catalog # 1139-SL)
  • Flow Cytometry
    0.25 µg/106 cells
    See below
  • Immunocytochemistry
    5-15 µg/mL
    See below
    • Human Siglec-9 Sandwich Immunoassay
      Reagent
  • ELISA Capture (Matched Antibody Pair)
    2-8 µg/mL 
    Human Siglec‑9 Antibody (Catalog # MAB1139)
  • ELISA Detection (Matched Antibody Pair)
    0.1-0.4 µg/mL 
    Human Siglec‑9 Biotinylated Antibody (Catalog # BAF1139)
  • ELISA Standard
     
    Recombinant Human Siglec-9 Fc Chimera Protein, CF (Catalog # 1139-SL)
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 Examples
Detection of Siglec‑9 in Human Monocytes by Flow Cytometry. Human peripheral blood monocytes were stained with Goat Anti-Human Siglec‑9 Biotinylated Antigen Affinity-purified Polyclonal Antibody (Catalog # BAF1139, filled histogram) or isotype control antibody (Catalog # BAF108, open histogram), followed by Streptavidin-Phycoerythrin (Catalog # F0040).
Immunocytochemistry
Siglec‑9 in Human PBMCs. Siglec‑9 was detected in immersion fixed human peripheral blood mononuclear cells (PBMCs) using Goat Anti-Human Siglec‑9 Biotinylated Antigen Affinity-purified Polyclonal Antibody (Catalog # BAF1139) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Streptavidin (yellow; Catalog # NL999) and counterstained with DAPI (blue). View our protocol for Fluorescent ICC Staining of Non-adherent Cells.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.2 mg/mL in sterile PBS.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
  • 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-9

Siglecs(1) (sialic acid binding Ig-like lectins) are I-type (Ig-type) lectins belonging to the Ig superfamily. They are characterized by an N-terminal Ig-like V-type domain which mediates sialic acid binding, followed by varying numbers of Ig-like C2-type domains (1, 2). Eleven 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 Siglec-5 to -11 (1‑4). To date, no Siglec has been shown to recognized any cell surface ligand other than sialic acids, suggesting that interactions with glycans containing this carbohydrate are important in mediating the biological functions of Siglecs. Siglecs 5 to 11 share a high degree of sequence similarity with CD33/Siglec-3 both in their extracellular and intracellular regions. They are collectively referred to as CD33-related Siglecs. One remarkable feature of the CD33-related Siglecs is their differential expression pattern within the hematopoietic system (2, 3). This fact, together with the presence of two conserved immunoreceptor tyrosine-based inhibition motifs (ITIMs) in their cytoplasmic tails, suggests that CD33-related Siglecs are involved in the regulation of cellular activation within the immune system.

The cDNA of human Siglec-9 encodes a 463 amino acid (aa) polypeptide with a hydrophobic signal peptide, an N-terminal Ig-likeV-type domain, two Ig-like C2-type domains, a transmembrane region and a cytoplasmic tail (5, 6). In peripheral blood leukocytes, Siglec-9 is expressed on neutrophils, monocytes, a fraction of NK cells, B cells, and a minor subset of CD8+ T cells (5). It binds equally well to both 2,3- and 2,6-linked sialic acid (5, 6). Siglec-9 is closely related to Siglec-7, and they share ~80% amino acid sequence identity. The gene encoding siglec-9 was mapped to chromosome 19q13.4.

  • References:
    1. Crocker, P.R. et al. (1998) Glycobiology 8:v.
    2. Crocker, P.R. and A. Varki (2001) Trends Immunol. 22:337.
    3. Crocker, P.R. and A. Varki (2001) Immunology 103:137.
    4. Angata, T. et al. (2002) J. Biol. Chem. 277:24466.
    5. Zhang, J.Q. et al. (2000) J. Biol. Chem. 275:22121.
    6. Angata, T. et al. (2000) J. Biol. Chem. 275:22127.
  • Long Name:
    Sialic Acid Binding Ig-like Lectin 9
  • Entrez Gene IDs:
    27180 (Human)
  • Alternate Names:
    CD329; CDw329; FOAP-9; OBBP-Like; Protein FOAP-9; sialic acid binding Ig-like lectin 9; sialic acid-binding Ig-like lectin 9; Siglec9; Siglec-9
Related Research Areas
Citations:

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citations: Showing 1 - 1

  1. Siglecs facilitate HIV-1 infection of macrophages through adhesion with viral sialic acids.
    Authors: Zou Z, Chastain A, Moir S
    PLoS ONE, 2011;6(9):e24559.
    Species: Human
    Sample Type: Whole Cells
    Application: Flow
Isotype Controls
Description Application Cat# Citations Images  

Normal Goat IgG Biotinylated Control

Ctrl BAF108 19
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Staining Reagents
Description Application Cat# Citations Images  

Streptavidin-Phycoerythrin

Flow F0040 7
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Streptavidin-Alkaline Phosphatase

ELISA(Det) AR001 2
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NorthernLights Streptavidin NL557

Flow, IHC, ICC NL999 4
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NorthernLights Streptavidin NL637

Flow, IHC, ICC NL998 2
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NorthernLights Streptavidin NL493

Flow, IHC, ICC NL997 1
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Streptavidin-Allophycocyanin

Flow F0050 1
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Avidin-Fluorescein

Flow F0030 1
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Supplemental Cell Selection Products
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MagCellect Streptavidin Ferrofluid

MAG999B 4
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MagCellect Streptavidin Ferrofluid

MAG999 4
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Supplemental ELISA Products
Description Application Cat# Citations Images  

Streptavidin-HRP

ELISA DY998 44
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EvenCoat Streptavidin Coated Plates

ELISA CP004
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EvenCoat Streptavidin Coated Plates, 5 Pack

ELISA CP003 3
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