Human B7-H2 Antibody

  
  • Species Reactivity
    Human
  • Specificity
    Detects human B7-H2 in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross-reactivity with recombinant human (rh) B7-1, rhB7-2, rhB7-H1, rhB7-H3, recombinant mouse (rm) B7-H2, or rmPD-L2 is observed.
  • Source
    Monoclonal Mouse IgG2B Clone # 136716
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human B7-H2
    Asp19-Ser258
    Accession # O75144
  • 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.
  • Endotoxin Level
    <0.10 EU per 1 μg of the antibody by the LAL method.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    Recombinant Human B7-H2 Fc Chimera (Catalog # 165-B7)
  • Neutralization
    Measured by its ability to neutralize B7‑H2-induced proliferation in PHA-activated human T cells. Wang, S. et al. (2000) Blood 96:2808. The Neutralization Dose (ND50) is typically 1-4 µg/mL in the presence of 3 µg/mL Recombinant Human B7‑H2 Fc Chimera and 20 ng/mL Human CD3 epsilon Monoclonal Antibody.
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 Proliferation Induced by B7‑H2 and Neutralization by Human B7‑H2 Antibody.
In the presence of Human CD3 epsilon  Monoclonal Antibody (20 ng/mL, Catalog # MAB100), Recombinant Human B7‑H2 Fc Chimera (Catalog # 165-B7) stimulates proliferation in PHA-activated human T cells in a dose-dependent manner (orange line). Under these conditions, proliferation elicited by Rec­ombinant Human B7‑H2 Fc Chimera (3 µg/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Human B7‑H2 Monoclonal Antibody (Catalog # MAB1651). The ND50 is typically 1-4 µg/mL.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.5 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: B7-H2

Human B7-H2, also called B7RP-1, B7h, LICOS, and GL50, is a 60 kDa member of the B7 family of immune costimulatory proteins, which includes B7-1, B7-2, B7-H1 (PD-L1), PD-L2, and B7-H3. B7 proteins are members of the immunoglobulin (Ig) superfamily; the extracellular domains contain 2 Ig-like domains and all members have short cytoplasmic domains. Family members share about 20‑25% amino acid identity. Within the extracellular domain, human B7-H2 shares 49% and 54% amino acid sequence identity with mouse and rat B7-H2, respectively. B7-H2 has been identified as the ligand for ICOS, a member of the CD28 family of costimulatory receptors. Human B7-H2 is a 309 amino acid (aa) protein with a putative 18 aa signal peptide, a 239 aa extracellular domain, an 18 aa transmembrane region, and a 33 aa cytoplasmic domain. Human B7-H2 is expressed constitutively on resting B cells, dendritic cells, and at low levels on monocytes. The B7-H2/ICOS interaction appears to play roles in T cell dependent B cell activation and Th differentiation.

  • References:
    1. Coyle, A.J. and J.C. Gutierrez-Ramos (2001) Nat. Immunol. 2:203.
    2. Ling, V. et al. (2000) J. Immunol. 164:1653.
    3. Wang, S. et al. (2000) Blood 96:2808.
    4. Brodie, D. et al. (2000) Curr. Biol. 10:333.
    5. Mages, H.W. et al. (2000) Eur. J. Immunol. 30:1040.
    6. Swallow, M.M. et al. (1999) Immunity 11:423.
    7. Yoshinaga, S.K. et al. (1999) Nature 402:827.
  • Long Name:
    B7 Homolog 2
  • Entrez Gene IDs:
    23308 (Human); 50723 (Mouse); 102132485 (Cynomolgus Monkey)
  • Alternate Names:
    B7H2; B7-H2; B7H2B7 homolog 2; B7-H2B7-related protein 1; B7RP-1; B7RP1B7-like protein Gl50; B7RP-1LICOS; CD275 antigen; CD275; GL50; GL50transmembrane protein B7-H2 ICOS ligand; ICOSL; ICOS-L; ICOSLG; inducible T-cell co-stimulator ligand; KIAA0653ICOS ligand
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Mouse IgG VisUCyte HRP Polymer Antibody

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

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Rat Anti-Mouse IgG2B Fluorescein-conjugated Antibody

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