Recombinant Human CD81 LEL Fc Chimera Protein, C EA

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Recombinant Human CD81 LEL Fc Chimera Protein, C EA信息二维码

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3-Amino-5-methoxycarbonylphenylboronic acid, pinacol ester  1 g 2,3-Dichloro-6-(trifluoromethyl)benzyl bromide  1 g 1-(4-Fluorophenyl)-5-methoxycarbonyl-2(1H)-pyridinone  1 g N,N-Diethyl-cyclohexane-1,4-diamine  1 g N-Methyl-DL-leucine hydrochloride  5 g N-(2-Chloroethyl) 3-boronobenzamide  5 g

产品介绍

    基本参数

    详细说明

    • Purity
      >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
    • Endotoxin Level
      <0.10 EU per 1 μg of the protein by the LAL method.
    • Activity
      Measured by its binding ability in a functional ELISA. When Recombinant Human CD81 LEL Fc Chimera is coated onto a microplate at 2 μg/mL, Recombinant Viral HCV E2 (Catalog # 9146-HC) binds with an ED 50 of 0.2-1.2 µg/mL.
    • Source
      Chinese Hamster Ovary cell line, CHO-derived
      MD Human IgG1
      (Pro100-Lys330)
      IEGR

      Human CD81 LEL
      (Phe113-Lys201)
      Accession # P60033

      N-terminus C-terminus
    • Accession #
    • N-terminal Sequence
      Analysis
      Met
    • Structure / Form
      Disulfide-linked homodimer
    • Predicted Molecular Mass
      36 kDa
    • SDS-PAGE
      36-41 kDa, reducing conditions
    9144-CD
     
    Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
    Reconstitution Reconstitute at 100 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.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
    Data Images
    Bioactivity

    When Recombinant Human CD81 LEL Fc Chimera (Catalog # 9144-CD) is coated onto a microplate at 2 μg/mL, Recombinant Viral HCV E2 (Catalog # 9146-HC) binds with an ED50 of 0.2-1.2 µg/mL.
    Background: CD81
    CD81, also known as TAPA-1 and Tetraspanin-28, is an approximately 25 kDa palmitoylated component of plasma membrane lipid rafts (1). It contains four transmembrane segments, two extracellular loops of 30 and 90 amino acids (aa), and three short cytoplasmic regions (2, 3). Within the large extracellular loop, human CD81 shares 90% and 84% aa sequence identity with mouse and rat CD81, respectively. CD81 associates with a wide range of membrane proteins including CD151, TfR2, LDL R, PCSK9, Glypican 3, IFITM1, IGSF8/CD316, FPRP, and complexes of CD19-CD21 (4-11). It is required for the development of CD4 +CD8 + DP thymocytes (12) and hepatocyte infection by Plasmodium sporozoites (13). It also supports B cell receptor signaling (11), Hepcidin expression (5), monocyte and B cell tethering to the vascular endothelium (14), and the immunosuppressive function of Treg and MDSC (15). CD81 additionally functions as a receptor for the E2 glycoprotein of hepatitis C virus (16). The CD81-E2 interaction inhibits NK cell cytolytic activity, provides a co-stimulatory signal to T cells, and inhibits the maturation of plasmacytoid dendritic cells (17-19).
    • References:
      1. Charrin, S. et al. (2014) J. Cell Sci. 127:3641.
      2. Oren, R. et al. (1990) Mol. Cell. Biol. 10:4007.
      3. Levy, S. et al. (1991) J. Biol. Chem. 266:14597.
      4. Zhu, Y.-Z. et al. (2012) Virology 429:112.
      5. Chen, J. and C.A. Enns (2015) J. Biol. Chem. 290:7841.
      6. Le, Q.-T. et al. (2015) J. Biol. Chem. 290:23385.
      7. Takahashi, S. et al. (1990) J. Immunol. 145:2207.
      8. Stipp, C.S. et al. (2001) J. Biol. Chem. 276:40545.
      9. Stipp, C.S. et al. (2001) J. Biol. Chem. 276:4853.
      10. Liu, B. et al. (2009) Am. J. Pathol. 175:717.
      11. Cherukuri, A. et al. (2004) J. Immunol. 279:31973.
      12. Boismenu, R. et al. (1996) Science 271:198.
      13. Silvie, O. et al. (2003) Nat. Med. 9:93.
      14. Feigelson, S.W. et al. (2003) J. Biol. Chem. 278:51203.
      15. Vences-Catalan, F. et al. (2015) Cancer Res. 75:4517.
      16. Pileri, P. et al. (1998) Science 282:938.
      17. Crotta, S. et al. (2002) J. Exp. Med. 195:35.
      18. Tseng, C.-T. and G.R. Klimpel (2002) J. Exp. Med. 195:43.
      19. Tu, Z. et al. (2013) Cell. Immunol. 284:98.
    • Entrez Gene IDs:
      975 (Human); 12520 (Mouse); 25621 (Rat)
    • Alternate Names:
      CD81 antigen (target of antiproliferative 1); CD81 antigen; CD81 molecule; CD81; CVID6; TAPA1; TAPA-1; Target of the antiproliferative 1; Tetraspanin-28; TSPAN28; Tspan-28; tspan-28,26 kDa cell surface protein TAPA-1; TSPAN28S5.7
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