Recombinant Mouse B7-H3 Protein
R&D Systems, part of Bio-Techne | Catalog # 1397-B3
Key Product Details
Product Specifications
Source
Mouse myeloma cell line, NS0-derived mouse B7-H3 protein
Val29-Phe244, with a C-terminal 10-His tag
Val29-Phe244, with a C-terminal 10-His tag
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.
N-terminal Sequence Analysis
Val29
Predicted Molecular Mass
24.8 kDa
SDS-PAGE
38-45 kDa, reducing conditions
Activity
Measured by its ability to enhance anti-CD3-induced proliferation of mouse CD3+ T cells.
The ED50 for this effect is typically 1.5-7.5 µg/mL.
The ED50 for this effect is typically 1.5-7.5 µg/mL.
Formulation, Preparation and Storage
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.
Carrier: 1397-B3
| Formulation | Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein. |
| Reconstitution | Reconstitute at 100 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin. |
| 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.
|
Carrier Free: 1397-B3/CF
| Formulation | Lyophilized from a 0.2 μm filtered solution in PBS. |
| Reconstitution | Reconstitute at 100 μg/mL in sterile 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.
|
Background: B7-H3
T cells require a signal induced by the engagement of the T cell receptor and a “costimulatory” signal(s) through distinct T cell surface molecules for optimal T cell expansion and activation. Members of the B7 superfamily of counter-receptors were identified by their ability to interact with costimulatory molecules found on the surface of T cells. Members of the B7 superfamily include B7-1 (CD80), B7-2 (CD86), B7-H1 (PD-L1), B7-H2 (B7RP-1), B7-H3, and PD-L2 (1). B7-H3 is expressed at very high levels in immature dendritic cells at moderate levels on mature dendritic cells, LPS stimulated immature dendritic cells and LPS stimulated monocytes, and at low levels on resting monocytes. B7-H3 binds to activated T cells via an as-of-yet identified receptor. B7-H3 co-stimulates proliferation of T cells and interferon-gamma (IFN-gamma) production and enhances the induction of cytotoxic T cells. B7-H3 shares 20 - 27% amino acid (aa) identity with other B7 family members (2). Murine B7-H3 is a 259 aa protein containing an extracellular domain, a transmembrane domain and a cytoplasmic domain. Mouse and human B7-H3 share 87% aa identity (3).
References
- Coyle, A.J. and J.-C. Gutierrez-Ramos (2001) Nature Immunol. 2:203.
- Chapoval, A.I. et al. (2001) Nature Immunol. 2:269.
- Sun, M. et al. (2002) J. Immunol. 168:6294.
Long Name
B7 Homolog 3
Alternate Names
B7H3, CD276
Gene Symbol
CD276
UniProt
Additional B7-H3 Products
Product Documents for Recombinant Mouse B7-H3 Protein
Product Specific Notices for Recombinant Mouse B7-H3 Protein
For research use only
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