Human EMR2 Antibody

  
  • Species Reactivity
    Human
  • Specificity
    Detects human EMR2 in direct ELISAs and Western blots. In direct ELISAs, this antibody shows less than 1% cross-reactivity with recombinant mouse EMR1.
  • Source
    Polyclonal Sheep IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    Chinese hamster ovary cell line CHO-derived recombinant human EMR2
    Gln24-Gln478 (Gln24 predicted)
    Accession # NP_038475
  • 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
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    See below
  • Neutralization
    Measured by its ability to neutralize EMR2-mediated adhesion of the NIH‑3T3 mouse embryonic fibroblast cell line. Stacey, M. et al. (2003) Blood 102:29161. The Neutralization Dose (ND50) is typically 1.5-6 µg/mL in the presence of 1.5 µg/mL Recombinant Human EMR2.
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
Cell Adhesion Mediated by EMR2 and Neutralization by Human EMR2 Antibody. Recombinant Human EMR2 (Catalog # 4894-EM), immobilized onto a microplate, supports the adhesion of the NIH‑3T3 mouse embryonic fibroblast cell line in a dose-dependent manner (orange line). Adhesion elicited by Recombinant Human EMR2 (1.5 µg/mL) is neutralized (green line) by increasing concentrations of Sheep Anti-Human EMR2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4894). The ND50 is typically 1.5-6 µg/mL.
Detection of Human EMR2 by Western Blot. Western blot shows lysates of THP‑1 human acute monocytic leukemia cell line. PVDF membrane was probed with 1 µg/mL of Sheep Anti-Human EMR2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4894) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for EMR2 at approximately 90 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 8.
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. *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: EMR2

EMR2 (EGF-like module-containing mucin-like receptor 2; designated CD312) is a glycoprotein belonging to the EGF-TM7 family of adhesion-type class B 7‑transmembrane (TM) receptors. EGF-like sequences within long extracellular N-termini, and a GPS (G-protein proteolytic site) domain are characteristic of this family, which is mainly expressed on cells of the immune system (1, 2). The human EMR2 cDNA encodes an 823 amino acid (aa) protein with five EGF-like domains within the first 250 aa, followed by a mucin-like stalk, a GPS domain (aa 479-530) and a 7-TM sequence (aa 531-785). The GPS domain is the site of autocatalytic cleavage, forming two cleaved portions that remain non-covalently attached as a heterodimer (1, 3). Of the first 290 aa of human EMR2, 284 aa (97%) are identical with family member CD97, likely due to gene duplication (2). The portion of human EMR2 N-terminal to the GPS domain (aa 1-478) shares 64%, 59%, 48% and 45% aa identity with corresponding regions of canine EMR2, equine EMR2, mouse CD97 and rat CD97, respectively. Alternate splicing of EMR2 creates isoforms that contain 2-5 EGF-like domains. Only the 5-EGF form contains EGF4, which is necessary for calcium-dependent binding of the EMR2/CD97 ligand, chondroitin sulfate (CS) (2, 4‑6). None of the isoforms engage the CD97 ligand, CD55 (DAF). EMR2 is restricted to myeloid cells (1, 2). EMR2 expression increases as monocytes differentiate into macrophages, and decreases with differentiation into dendritic cells (5). Activation increases neutrophil EMR2 expression (5). EMR2 localizes to the leading edge of migrating neutrophils and plays an important role in migration, adhesion and superoxide production (7). It is also thought to facilitate specific interaction of myeloid cells with peripheral B lymphocytes which express CS (6).

  • References:
    1. Kwakkenbos, M.J. et al. (2004) Immunogenetics 55:655.
    2. Lin, H.-H. et al. (2000) Genomics 67:188.
    3. Lin, H.-H. et al. (2004) J. Biol. Chem. 279:31823.
    4. Stacey, M. et al. (2003) Blood 102:2916.
    5. Chang G.-W. et al. (2007) Biochem. Biophys. Res. Commun. 353:133.
    6. Kwakkenbos, M.J. et al. (2005) J. Leukoc. Biol. 77:112.
    7. Yona, S. et al. (2008) FASEB J. 22:741.
  • Long Name:
    EGF-like Module Containing, Mucin-like, Hormone Receptor-like 2
  • Entrez Gene IDs:
    30817 (Human)
  • Alternate Names:
    CD312; DKFZp781B135; egf-like module containing, mucin-like, hormone receptor-like 2; egf-like module containing, mucin-like, hormone receptor-like sequence 2; EGF-like module receptor 2; EGF-like module-containing mucin-like hormone receptor-like 2; EMR2
Related Research Areas
Isotype Controls
Description Application Cat# Citations Images  

Normal Sheep IgG Control

Ctrl 5-001-A 9
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Secondary Antibodies
Description Application Cat# Citations Images  

Sheep IgG HRP-conjugated Antibody

WB, Simple Western HAF016 14  
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Donkey Anti-Sheep IgG NorthernLights™ NL557-conjugated Antibody

Flow, IHC, ICC NL010 3
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Donkey Anti-Sheep IgG NorthernLights™ NL637-conjugated Antibody

Flow, IHC, ICC NL011 5
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Donkey Anti-Sheep IgG NorthernLights™ NL493-conjugated Antibody

Flow, IHC, ICC NL012 2
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Sheep IgG (H+L) PE-conjugated Antibody

Flow F0126  
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Donkey Anti-Sheep IgG Biotinylated Antibody

WB BAF016 2
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Sheep IgG (H+L) APC-conjugated Antibody

Flow F0127  
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Sheep IgG VisUCyte HRP Polymer Antibody

IHC VC006  
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Donkey Anti-Sheep IgG (H+L) Fluorescein-conjugated Antibody

Flow F0125 1
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Donkey Anti-Sheep IgG (H+L) PerCP-conjugated Antibody

Flow F0128
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