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Recombinant Human B7-H7/HHLA2 Fc Chimera Protein, CF

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Recombinant Human B7-H7/HHLA2 Fc Chimera (Catalog # 8084-B7) inhibits anti-CD3 antibody induced IL-2 secretionin human T lymphocytes. The ED50 for this effect is 0.075‑0.75 μg/mL in the presence of Goat ...read more

Product Details

Summary
Reactivity HuSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

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Recombinant Human B7-H7/HHLA2 Fc Chimera Protein, CF Summary

Details of Functionality
Measured by its ability to inhibit anti-CD3 antibody induced IL-2 secretion in human T lymphocytes. The ED50 for this effect is 0.075-0.75 μg/mL.
Source
Human embryonic kidney cell, HEK293-derived human B7-H7/HHLA2 protein
Human B7-H7/HHLA2
(Ile23-Asn344)
Accession # Q9UM44
IEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Ile23
Structure / Form
Disulfide-linked homodimer
Protein/Peptide Type
Recombinant Proteins
Gene
HHLA2
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Dilutions
  • Bioactivity
Theoretical MW
64 kDa (monomer).
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
90-100 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
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 100 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-H7/HHLA2 Fc Chimera Protein, CF

  • B7H7
  • B7-H7
  • HERV-H LTR-associating 2
  • HERV-H LTR-associating protein 2
  • HHLA2
  • Human endogenous retrovirus-H long terminal repeat-associating protein 2

Background

B7-H7, also known as HHLA2 (HERV-H LTR-associating 2), is a member of the B7 family of immune regulatory proteins (1, 2). Mature human B7-H7 consists of a 322 amino acid (aa) extracellular domain (ECD) with three immunoglobulin-like domains, a 21 aa transmembrane segment, and a 49 aa cytoplasmic domain (3-5). B7‑H7 is constitutively expressed on monocytes and is up-regulated by LPS and IFN-gamma stimulation. It is expressed on LPS/IFN-gamma treated B cells but not on resting B cells (5). B7-H7 binds to cell surface determinants on resting and mature T cells, B cells, and monocytes as well as on immature and mature dendritic cells (5). Soluble B7-H7 inhibits the proliferation of activated CD4+ and CD8+ T cells and their production of IFN-gamma , TNF-alpha , IL-5, IL-10, IL-13, IL-17A, and IL-22 (5).
  1. Zou, W. and L. Chen (2008) Nat. Rev. Immunol. 8:467.
  2. Bour-Jordan, H. et al. (2011) Immunol. Rev. 241:180.
  3. Mager, D.L. et al. (1999) Genomics 59:255.
  4. Flajnik, M.M. et al. (2012) Immunogenetics 64:571.
  5. Zhao, R. et al. (2013) Proc. Natl. Acad. Sci. USA 110:9879.

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Bioinformatics

Gene Symbol HHLA2
Uniprot