Recombinant Cynomolgus Monkey CD200 Fc Chimera Protein, CF

Catalog # Availability Size / Price Qty
9274-CD-100
R&D Systems Recombinant Proteins and Enzymes
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Recombinant Cynomolgus Monkey CD200 Fc Chimera Protein, CF Summary

Product Specifications

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 CD200 R1 Fc Chimera (Catalog # 3414-CD) is immobilized at 0.5 μg/mL (100 μL/well), the concentration of Recombinant Cynomolgus Monkey CD200 Fc Chimera that produces 50% of the optimal binding response is 5-35 ng/mL.
Source
Chinese Hamster Ovary cell line, CHO-derived cynomolgus monkey CD200 protein
Cynomolgus Monkey CD200
(Gln56-Gly257)
Accession # EHH51019
IEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Analysis
No results obtained. Gln56 inferred from enzymatic pyroglutamate treatment revealing Val57
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
49 kDa
SDS-PAGE
64-73 kDa, reducing conditions

Product Datasheets

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9274-CD

Carrier Free

What does CF mean?

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.

What formulation is right for me?

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.

9274-CD

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 1 mg/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.
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Background: CD200

CD200, also known as OX-2, is a 45 kDa transmembrane immunoregulatory protein that belongs to the immunoglobulin superfamily. Mature cynomolgus CD200 consists of a 202 aa extracellular domain (ECD) with one Ig-like V-type domain and one Ig-like C2-type domain, a 27 aa transmembrane segment, and a 19 aa cytoplasmic domain. Within the ECD, cynomolgus CD200 shares 95%, 78%, and 78% aa sequence identity with human, mouse, and rat CD200, respectively. CD200 is widely but not ubiquitously expressed (2). Its receptor (CD200 R1) is restricted primarily to mast cells, basophils, macrophages, and dendritic cells, which suggests myeloid cell regulation as the major function of CD200 (3-5). CD200 knockout mice are characterized by increased macrophage number and activation and are predisposed to autoimmune disorders (6). CD200 and CD200 R associate via their respective N-terminal Ig-like domains (7). In myeloid cells, CD200 R initiates inhibitory signals following receptor-ligand contact (4, 5, 8). In T cells, however, CD200 functions as a costimulatory molecule independent of the CD28 pathway (9). Several additional CD200 R-like molecules have been identified in human and mouse, but their capacity to interact with CD200 is controversial (10, 11). Several viruses encode CD200 homologs which are expressed on infected cells during the lytic phase (12, 13). Like CD200 itself, viral CD200 homologs also suppress myeloid cell activity, enabling increased viral propagation (3, 12-14).

References
  1. Vaine, C.A. and R.J. Soberman (2014) Adv. Immunol. 121:191.
  2. Wright, G.J. et al. (2001) Immunology 102:173.
  3. Shiratori, I. et al. (2005) J. Immunol. 175:4441.
  4. Cherwinski, H.M. et al. (2005) J. Immunol. 174:1348.
  5. Fallarino, F. et al. (2004) J. Immunol. 173:3748.
  6. Hoek, R.M. et al. (2000) Science 290:1768.
  7. Hatherley, D. and A.N. Barclay (2004) Eur. J. Immunol. 34:1688.
  8. Jenmalm, M.C. et al. (2006) J. Immunol. 176:191.
  9. Borriello, F. et al. (1997) J. Immunol. 158:4548.
  10. Gorczynski, R. et al. (2004) J. Immunol. 172:7744.
  11. Hatherley, D. et al. (2005) J. Immunol. 175:2469.
  12. Foster-Cuevas, M. et al. (2004) J. Virol. 78:7667.
  13. Cameron, C.M. et al. (2005) J. Virol. 79:6052.
  14. Langlais, C.L. et al. (2006) J. Virol. 80:3098.
Entrez Gene IDs
4345 (Human); 17470 (Mouse); 102146004 (Cynomolgus Monkey)
Alternate Names
antigen identified by monoclonal MRC OX-2; CD200 antigenMOX1; CD200 molecule; CD200; MOX1; MOX2; MOX2MRC; MRC OX-2 antigen; MRC; OX-2 membrane glycoprotein; OX-2

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