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| Product Name | Human CD275 / B7-H2 / ICOS Ligand Protein (Recombinant) |
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| Description | Purity >95% by SDS-PAGE gel and HPLC analyses., MW: 104.9 kDa or 90-95 kDa. B7-H2, or inducible costimulator-ligand (ICOSL), is a transmembrane, co-stimulatory ligand of the T cell-specific surface receptor Inducible T-cell costimulator (ICOS) that belongs to the B7 family and immunoglobulin superfamily, along with B7-1, B7-2, PD-L1 (B7-H1) and PD-L2. Whereas expression of inducible B7-1 and B7-2 is largely confined to specialized antigen-presenting cells of lymphoid tissues, B7-H2 expression occurs constitutively in hematopoietic and non-hematopoietic cells of peripheral organs. This striking difference in expression indicates that these three B7 ligands may enable temporally and spatially specific regulation of T cell response through non-competitive CD28 interaction; marking a unique function of B7-H2 in immune reactions of nonlymphoid organs in which T cells have migrated to peripheral tissues having only limited expression of B7-1 and B7-2. Expression of B7-H2 has been shown to be differentially regulated by both TNF-a and IL-1β, and inducible to a lesser extent by CD40 or lipopolysaccharide stimulation. B7-H2's binding to ICOS on activated T cells results in both positive and negative effects on immune response, including its own downregulation. As a member of the immunoglobulin superfamily, B7-H2 is crucially involved in inflammatory immune reactions and the control of excessive immune response; however, unlike B7-1 and B7-2, B7-H2 has not been shown to influence immunity through interaction with CTLA-4, and has only been shown to have restricted interaction with CD28. Interaction of B7-H2 with ICOS has been identified as a critical event in the immunosuppression of tumor-associated memory CD4+ T cells, and has been linked to various auto-immune disorders. PeproTech's CHO cell-derived Recombinant Human B7-H2 Fc is a glycosylated, disulfide-linked homodimer of 942 amino acid residues whose monomer consists of the 238-amino-acid length extracellular portion of B7-H2 fused to the 231-amino-acid length Fc portion of human IgG1 by two glycines. The calculated molecular weight of Recombinant Human B7-H2 Fc dimer is 104.9 kDa; however, due to glycosylation, it migrates at an apparent molecular weight of approximately 90-95 kDa by SDS-PAGE analysis under reducing conditions. |
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| Size | n/a |
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| Concentration | n/a |
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| Applications | n/a |
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| Other Names | ICOSLG, B7RP1, B7 homolog 2, B7 homologue 2, B7-H2, B7H2, B7RP-1, CD275 antigen, ICOS ligand, GL50, ICOS-L, ICOSL, KIAA0653, B7-like protein Gl50, B7-related protein 1, CD275, LICOS |
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| Gene, Accession, CAS # | ICOSLG, Gene ID: 23308 |
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| Catalog # | LS-G133818 |
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| Order / More Info | Human CD275 / B7-H2 / ICOS Ligand Protein (Recombinant) from LIFESPAN BIOSCIENCES INC. |
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| Product Specific References | n/a |
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