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SKU: PKSH031453_100μg-ES
Recombinant Human B7-H4/VTCN1 Protein (Fc Tag), 100 μg
V-set domain-containing T-cell activation inhibitor 1, also known as B7X, B7H4, B7S1, and VTCN1, is a single-pass type-III membrane protein belonging to the B7 family of costimulatory proteins. These proteins are expressed on the surface of antigen-presenting cells and interact with ligands on T lymphocytes. They provide costimulatory signals that regulate T cell responses. A soluble form of B7H4 has also been detected. B7X / VTCN1 / B7H4 negatively regulates T-cell-mediated immune response by inhibiting T-cell activation, proliferation, cytokine production and development of cytotoxicity. When expressed on the cell surface of tumor macrophages, B7X / VTCN1 / B7H4 plays an important role, together with regulatory T-cells(Treg), in the suppression of tumor-associated antigen-specific T-cell immunity. B7X / VTCN1 / B7H4 is also involved in promoting epithelial cell transformation. This membrane protein can be up-regulated by IL6 / interleukin-6 and IL10 / interleukin-10 and inhibited by CSF2 / GM-CSF and IL4 / interleukin-4 on antigen-presenting cells.
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Product Specification
Basic Information
Brands:Elabscience
Model Number:
Place of Origin:China
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Reconstitution:Please refer to the printed manual for detailed information.
Shipping:This product is provided as lyophilized powder which is shipped with ice packs.
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Calculated Molecular Weight:52.3 kDa
Observed Molecular Weight:66-76 kDa
Purity: > 95 % as determined by reducing SDS-PAGE.
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Storage:Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months.
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Calculated Molecular Weight:52.3 kDa
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Endotoxin: < 1.0 EU per μg of the protein as determined by the LAL method.
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Application:Cell culture
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Research Areas:Cell Biology,Immunology,Cancer
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Bio-activity:Measured by its ability to inhibit anti-CD3 antibody and anti-CD28 antibody induced IFNγ secretion in human T lymphocytes. The ED50 for this effect is typically 0.7-3. 5μg/ml.
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Formulation:Lyophilized from sterile PBS, pH 7.4
Normally 5% - 8% trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization.
Please refer to the specific buffer information in the printed manual.
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