Recombinant Human VISTA/B7-H5/PD-1H Fc Avi-tag Protein, CF
Recombinant Human VISTA/B7-H5/PD-1H Fc Avi-tag Protein, CF Summary
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- Guaranteed Bioactivity and High Purity: Bioactivity tested by functional ELISA and purity determined by SDS-PAGE to be greater than 95%.
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Find the His Avi-tag VISTA protein here His Avi-tag VISTA Protein
Product Specifications
| Human VISTA/B7-H5/PD-1H (Phe33-Ala194) Accession # AAH20568 | IEGRMD | Human IgG1 (Pro100-Lys330) | Avi-tag |
| N-terminus | C-terminus | ||
Analysis
Product Datasheets
Carrier Free
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
AVI7126
| Formulation | Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. |
| Reconstitution | Reconstitute at 500 μg/mL in 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.
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Scientific Data
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When Recombinant Human VSIG3 Fc Chimera (Catalog # 9229-VS) is coated at 5 µg/mL, Biotinylated Recombinant Human VISTA/B7-H5/PD-1H Fc Chimera Avi-tag (Catalog # AVI7126) binds with an ED50 of 0.5-3 µg/mL.
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2 μg/lane of Biotinylated Recombinant Human VISTA/B7-H5/PD-1H Fc Chimera Avi-tag (Catalog # AVI7126) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 64-75 kDa and 130-150 kDa, respectively.
Reconstitution Calculator
Background: VISTA/B7-H5/PD-1H
Platelet receptor Gi24, also known as Dies1, VISTA, SISP1 and B7‑H5, is a 55‑65 kDa transmembrane glycoprotein with homology to B7‑like immune co‑stimulatory molecules (1, 2). Mature human Gi24 contains a 162 amino acid (aa) extracellular domain (ECD) with one V‑type Ig‑like domain, a 21 aa transmembrane segment, and a 96 aa cytoplasmic domain. Within the ECD, human Gi24 shares 70% and 67% aa sequence identity with mouse and rat Gi24, respectively (3). The 30 kDa ECD can be shed by MT1‑MMP, with a 25‑30 kDa fragment remaining in the membrane (3). Gi24 promotes both MT1‑MMP expression and the MT1‑MMP mediated activation of MMP‑2 (3). Gi24 supports the differentiation of embryonic stem cells (ESC) and enhances BMP‑4 induced signaling in ESC, but is also down‑regulated following BMP‑4 exposure (4, 5). It binds to BMP‑4 directly, and also associates with the type I BMP receptor Activin RIB/ALK‑4 (4, 5). Gi24 is expressed on the surface of naïve CD4+ T cells and regulatory T cells (6). It is up‑regulated in vivo on activated monocytes and dendritic cells (5). Gi24 inhibits CD4+ and CD8+ T cell proliferation, and their production of IL‑2 and IFN‑ gamma (6). Its expression on tumor cells attenuates the anti‑tumor immune response and enables more rapid tumor progression (6). In contrast, Gi24 limits disease progression in the autoimmune disease model EAE (6).
- Flajnik, M.F. et al. (2012) Immunogenetics 64:571.
- Wilcox, R.A. et al. (2012) Eur. J. Haematol. 88:465.
- Sakr, M.A. et al. (2010) Cancer Sci. 101:2368.
- Aloia, L. et al. (2010) J. Biol. Chem. 285:7776.
- Parisi, S. et al. (2012) FASEB J. 26:3957.
- Wang, L. et al. (2011) J. Exp. Med. 208:577.
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