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Recombinant Human B7-2/CD86 His Tag Protein, CF

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When Recombinant Human B7-2/CD86 (9090-B2) is coated at 0.5 µg/mL, Recombinant Human CTLA-4 Fc Chimera (Catalog # 7268-CT) binds with a typical ED50 of7-42 ng/mL.
When Recombinant Human B7-2/CD86 (9090-B2) is coated at 0.5 µg/mL, Recombinant Human CTLA-4 Fc Chimera (Catalog # 7268-CT) binds with a typical ED50 of7-42 ng/mL.

Product Details

Summary
Reactivity HuSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

Order Details

View Available Formulations
Catalog# & Formulation Size Price
Carrier Free
9090-B2-01M
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Recombinant Human B7-2/CD86 His Tag Protein, CF Summary

Details of Functionality
Measured by its binding ability in a functional ELISA. When Recombinant Human B7-2/CD86 is coated at 0.5 µg/mL, Recombinant Human CTLA-4 Fc Chimera  (Catalog # 7268-CT) binds with a typical ED50 of 7-42 ng/mL.
Source
Human embryonic kidney cell, HEK293-derived human B7-2/CD86 protein
Leu26-Pro247, with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Leu26
Protein/Peptide Type
Recombinant Proteins
Gene
CD86
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Dilutions
  • Bioactivity
Theoretical MW
26 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
57-66 kDa, reducing conditions

Packaging, Storage & Formulations

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.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS.
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 500 μg/mL in PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human B7-2/CD86 His Tag Protein, CF

  • Activation B7-2 antigen
  • B70
  • B7-2 antigen
  • B72
  • B7-2
  • B-lymphocyte activation antigen B7-2
  • BU63
  • CD28 antigen ligand 2
  • CD28LG2B7-2 antigen)
  • CD86 antigen
  • CD86 molecule
  • CD86
  • CTLA-4 counter-receptor B7.2
  • FUN-1
  • LAB72
  • MGC34413
  • T-lymphocyte activation antigen CD86

Background

B7-2, also known as CD86, B70, and ETC-1, is a 60-100 kDa variably glycosylated protein in the B7 family. B7 family members are transmembrane cell surface molecules that play important roles in immune activation and the maintenance of immune tolerance (1, 2). Mature human B7-2 consists of a 224 amino acid (aa) extracellular domain (ECD) with two Ig-like domains, a 21 aa transmembrane segment, and a 61 aa cytoplasmic tail (3, 4). Within the ECD, human B7-2 shares 59% aa sequence identity with mouse and rat B7-2. Alternative splicing of human B7-2 generates additional isoforms that lack both Ig-like domains or a region that includes the transmembrane segment. B7-2 is highly expressed on activated antigen presenting cells (APC), e.g. B cells, dendritic cells, and monocytes (4-7), as well as on vascular endothelial cells (8). B7-2 and the closely related B7-1/CD80 exhibit overlapping but distinct functional properties. Their binding to CD28, which is constitutively expressed on T cells, enhances T cell receptor signaling and also provides TCR-independent co-stimulation (3-5, 7, 9-11). B7-1 and B7-2 additionally bind the CD28-related protein, CTLA-4, which is up-regulated and recruited to the immunological synapse (IS) at the onset of T cell activation (3-5, 7, 9, 10). CTLA-4 ligation inhibits the T cell response and supports regulatory T cell function (12). B7-2 is expressed earlier than B7-1 following APC activation (6), and both proteins bind with higher affinity to CTLA-4 than to CD28 (10). B7-2 promotes the stabilization of CD28 in the IS, while B7-1 is primarily responsible for promoting CTLA-4 recruitment and accumulation in the IS (13). The relative participation of B7-1 and B7-2 in T cell co-stimulation can also alter the Th1/Th2 bias of the immune response (14). Both B7-1 and B7-2 serve as cellular receptors for B species adenoviruses (15).
  1. Greenwald, R.J. et al. (2005) Annu. Rev. Immunol. 23:515.
  2. Bour-Jordan, H. et al. (2011) Immunol. Rev. 241:180.
  3. Freeman, G.J. et al. (1993) Science 262:909.
  4. Azuma, M. et al. (1993) Nature 366:76.
  5. Freeman, G.J. et al. (1993) J. Exp. Med. 178:2185.
  6. Lenschow, D.J. et al. (1993) Proc. Natl. Acad. Sci. USA 90:11054.
  7. Hathcock, K.S. et al. (1993) Science 262:905.
  8. Seino, K. et al. (1995) Int. Immunol. 7:1331.
  9. Chen, C. et al. (1994) J. Immunol. 152:4929.
  10. Lanier, L.L. et al. (1995) J. Immunol. 154:97.
  11. Rudd, C.E. et al. (2009) Immunol. Rev. 229:12.
  12. Wing, K. et al. (2011) Trends Immunol. 32:428.
  13. Pentcheva-Hoang, T. et al. (2004) Immunity 21:401.
  14. Kuchroo, V.K. et al. (1995) Cell 80:707.
  15. Short, J.J. et al. (2006) Virus Res. 122:144.

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Bioinformatics

Gene Symbol CD86
Uniprot