Product Details
Synonyms
B7-H3, CD276, B7 homolog 3
Source
Biotinylated Mouse B7-H3 (2Ig) Protein, His,Avitag (B73-M82E3) is expressed from human 293 cells (HEK293). It contains AA Val 29 - Phe 244 (Accession # Q8VE98-1).
Predicted N-terminus: Val 29
Request for sequenceMolecular Characterization

Other Tags and Version Biotin & Other Labeled Version
This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).
The protein has a calculated MW of 27.1 kDa. The protein migrates as 38-45 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
Labeling
Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
Protein Ratio
Passed as determined by the HABA assay / binding ELISA.
Purity
>90% as determined by SDS-PAGE.
>95% as determined by SEC-MALS.
Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
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Performance Data
SDS-PAGE

Biotinylated Mouse B7-H3 (2Ig) Protein, His,Avitag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90% (With Star Ribbon Pre-stained Protein Marker).
SEC-MALS

The purity of Biotinylated Mouse B7-H3 (2Ig) Protein, His,Avitag (Cat. No. B73-M82E3) is more than 95% and the molecular weight of this protein is around 30-45 kDa verified by SEC-MALS.
Report
Bioactivity-ELISA

Immobilized Biotinylated Mouse B7-H3 (2Ig) Protein, His,Avitag (Cat. No. B73-M82E3) at 1 μg/mL (100 μL/well) on streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate can bind Anti-B7-H3 Antibody, Mouse IgG1 with a linear range of 0.1-4 ng/mL (QC tested).
Protocol
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FAQ
- Product
What is the difference between Human B7-H3 and Human B7-H3 (4Ig)?
The Human B7-H3 protein with an expression range of Leu29–Pro245 contains a single pair of immunoglobulin-like V and C domains. The product with an expression range of Gly27–Thr461, named B7-H3 (4Ig), includes the entire extracellular region.
Background
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