Human B7-H3 (4Ig) /B7-H3b Protein
Catalog No: B7H3-HP004
- Species
- Human
- Expression System
- HEK293
- Tag
- His
- Activity
- Activity verified
Product overview
Recombinant Human B7-H3 (4Ig) /B7-H3b Protein is expressed in HEK293 cells with a His tag at the C-terminus. It contains amino acid residues Gly27-Thr461 (UniProt accession: Q5ZPR3-1).
Product Details
- Molecular Aliases
- B7-H3; CD276; PSEC0249; 4Ig-B7-H3; UNQ309; PRO352; B7 homolog 3; CD276
- Protein Length
- Gly27-Thr461
- Expression System
- HEK293
- Theoretical Molecular Weight
- The protein has a predicted MW of 48.25 kDa. Due to glycosylation, the protein migrates to 68-78 kDa based on Bis-Tris PAGE result.
- Purity
- > 95% as determined by Bis-Tris PAGE > 95% as determined by HPLC
- Endotoxin
- Less than 0.1 EU per μg by the LAL method.
- Buffer / Formulation
- Lyophilized from 0.22 μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.
- State
- Lyophilized
- Storage Conditions
- -20 to -80°C for 12 months as supplied from date of receipt. -80°C for 3 months after reconstitution. Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.
- Reconstitution Advice
- Dissolve the lyophilized protein in distilled water. Please refer to the Certificate of Analysis for detailed instructions.
Data Display
Human B7-H3 (4Ig) on Bis-Tris PAGE under reduced condition. The purity is greater than 95%.
The purity of Human B7-H3 (4Ig) is greater than 95% as determined by SEC-HPLC.
Immobilized Human B7-H3 (4Ig), His Tag at 0.5μg/ml (100μl/well) on the plate. Dose response curve for Anti-B7-H3 Antibody, hFc Tag with the EC50 of 5.0ng/ml determined by ELISA. (QC Test)
Loaded Anti-B7-H3 Ab., hFc Tag on ProA-Biosensor can bind Human B7-H3 (4Ig), His Tag with an affinity constant of 4.59 nM as determined in BLI assay.
Background
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.
References
- 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) Note: HPLC results always come from liquid protein, due to absorption peak interference of trehalose in lyophilized powder.
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