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Human B7-H3 (4Ig)/B7-H3b Protein

Product Info

Recombinant Human B7-H3 (4Ig)/B7-H3b Protein is expressed from Expi293 with His tag and Avi tag at the C-terminal. It contains Gly27-Thr461.[Accession | Q5ZPR3-1]

Molecular Weight

The protein has a predicted MW of 49.5 kDa. Due to glycosylation, the protein migrates to 70-80 kDa based on Tris-Bis PAGE result.


Less than 1EU per μg by the LAL method.


> 95% as determined by Tris-Bis PAGE
> 95% as determined by SEC-HPLC


Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 5 % trehalose is added as protectant before lyophilization.


Centrifuge tubes before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.


The product should be stored at -70℃ or -20℃.

Assay Data
Tris-Bis PAGE

Human B7-H3 (4Ig)/B7-H3b on Tris-Bis PAGE under reduced condition. The purity is greater than 95%.


The purity of Human B7-H3 (4Ig)/B7-H3b is greater than 95% as determined by SEC-HPLC.


Immobilized Human B7-H3b at 1μg/ml (100μl/Well) on the plate. Dose response curve for Anti-B7-H3 Ab., hFc Tag with the EC50 of 15.7ng/ml determined by ELISA.


B7-H3, a member of the B7 family of immunomodulatory molecules, is overexpressed in a wide range of solid cancers.B7-H3 binds to activated T cells via an as yet unidentified receptor. In assays using sub-optimal amount so anti-CD3 stimulation, 2Ig‑B7‑H3 enhances T cell proliferation, T cell interferon-gamma (IFN-gamma ) production, and cytotoxic T cells induction.


B7-H3; CD276; PSEC0249; 4Ig-B7-H3; B7-H3; CD276; PSEC0249; UNQ309; PRO352; B7 homolog 3


(1)Fodstad O , Tekle C , Chen Y W . The Immunoregulatory Protein Human B7H3 is a Tumor-Associated Antigen that Regulates Tumor Cell Migration and Invasion[J]. Current Cancer Drug Targets, 2008, 8(5)

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