Mouse B7-H3 Antibody

Catalog # Availability Size / Price Qty
Detection of Mouse B7‑H3 by Western Blot.
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Product Details
Citations (2)
Supplemental Products

Mouse B7-H3 Antibody Summary

Species Reactivity
Detects mouse B7‑H3 in direct ELISAs and Western blots. In direct ELISAs and Western blots, approximately 50% cross‑reactivity with recombinant human (rh) B7-H3 is observed, and less than 1% cross-reactivity with recombinant mouse (rm) B7‑H1, rmB7-H2 and rmB7-1 is observed.
Polyclonal Goat IgG
Antigen Affinity-purified
Mouse myeloma cell line NS0-derived recombinant mouse B7‑H3
Accession # Q8VE98
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Endotoxin Level
<0.10 EU per 1 μg of the antibody by the LAL method.


Recommended Concentration
Western Blot
1 µg/mL
See below
Measured by its ability to neutralize B7‑H3-induced proliferation in mouse CD3+ T cells. The Neutralization Dose (ND50) is typically 1.5-7.5 µg/mL in the presence of 2 µg/well Recombinant Mouse B7‑H3 and 100 ng/mL Hamster Anti-Mouse CD3 epsilon Monoclonal Antibody (Catalog # MAB484).

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Western Blot Detection of Mouse B7-H3 antibody by Western Blot. View Larger

Detection of Mouse B7‑H3 by Western Blot. Western blot shows lysates of MEF mouse embryonic feeder cells, P19 mouse embryonal carcinoma cell line, NIH-3T3 mouse embryonic fibroblast cell line, C2C12 mouse myoblast cell line, and 3T3-L1 mouse embryonic fibroblast adipose-like cell line. PVDF membrane was probed with 1 µg/mL of Goat Anti-Mouse B7-H3 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1397) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF017). A specific band was detected for B7-H3 at approximately 45-55 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Neutralization Proliferation Induced by B7‑H3 and Neutralization by Mouse B7‑H3 Antibody. View Larger

Proliferation Induced by B7‑H3 and Neutralization by Mouse B7‑H3 Antibody. Recombinant Mouse B7-H3 enhances proliferation in mouse CD3+T cells in the presence of 100 ng/mL Hamster Anti-Mouse CD3e Monoclonal Antibody (Catalog # MAB484) in a dose-dependent manner (orange line), as measured by the Resazurin (Catalog # AR002). Proliferation elicited by Recombinant Mouse B7-H3 (2 µg/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Mouse B7-H3 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1397). The ND50 is typically 1.5-7.5 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.


Preparation and Storage

Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
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.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: B7-H3

T cells require a signal induced by the engagement of the T cell receptor and a “co‑stimulatory” 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 co‑stimulatory 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).

  1. Coyle, A.J. and J.-C. Gutierrez-Ramos (2001) Nature Immunol. 2:203.
  2. Chapoval, A.I. et al. (2001) Nature Immunol. 2:269.
  3. Sun, M. et al. (2002) J. Immunol. 168:6294.
Long Name
B7 Homolog 3
Entrez Gene IDs
80381 (Human); 102657 (Mouse); 315716 (Rat); 102131295 (Cynomolgus Monkey)
Alternate Names
B7H3; B7-H3; B7H34Ig-B7-H3; B7-H3B7 homolog 3; CD276 antigen; CD276 molecule; CD276; Costimulatory molecule

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Citations for Mouse B7-H3 Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

2 Citations: Showing 1 - 2
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  1. The immune checkpoint B7-H3 (CD276) regulates adipocyte progenitor metabolism and obesity development
    Authors: E Picarda, PM Galbo, H Zong, MR Rajan, V Wallenius, D Zheng, E Börgeson, R Singh, J Pessin, X Zang
    Science Advances, 2022;8(17):eabm7012.
    Species: Mouse
    Sample Types: Cell Lysates
    Applications: Western Blot
  2. Origination of new immunological functions in the costimulatory molecule B7-H3: the role of exon duplication in evolution of the immune system.
    Authors: Sun J, Fu F, Gu W, Yan R, Zhang G, Shen Z, Zhou Y, Wang H, Shen B, Zhang X
    PLoS ONE, 2011;6(9):e24751.
    Species: Mouse
    Sample Types: Cell Lysates
    Applications: Western Blot


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Isotype Controls

Reconstitution Buffers

Secondary Antibodies

Goat IgG (H+L) Antibody


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