Recombinant Human B7-H7 Fc Biotinylated Protein, CF

Catalog # Availability Size / Price Qty
BT8084-050
Recombinant Human B7-H7 Fc Biotinylated Protein Binding Activity
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Recombinant Human B7-H7 Fc Biotinylated 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 TMIGD2/CD28H Fc Chimera (Catalog # 8316‑TR) is immobilized at 0.125 μg/mL, 100 μL/well, the concentration of Biotinylated Recombinant Human B7-H7/HHLA2 Fc Chimera that produces 50% of the optimal binding response is 0.025-0.125 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
Analysis
Ile23
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
64 kDa (unlabeled)

Product Datasheets

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.

BT8084

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 200 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
  • 12 months from date of receipt, ≤ -20 °C as supplied.
  • 2 weeks, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, ≤ -20 °C under sterile conditions after reconstitution.

Data Image

Binding Activity Recombinant Human B7-H7 Fc Biotinylated Protein Binding Activity View Larger

When Recombinant TMIGD2/CD28H (Catalog # 8316-TR) Fc Chimera is coated at 0.125 µg/mL Recombinant Human B7-H7/HHLA2 Fc Chimera Biotinylated Protein (Catalog # BT8084) binds with an ED50 of 0.025-0.125 µg/mL.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: B7-H7/HHLA2

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).

References
  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.
Long Name
B7 Homolog 7
Entrez Gene IDs
11148 (Human); 102137704 (Cynomolgus Monkey)
Alternate Names
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

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