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Your Position: 홈 > Protein > B7-H3 (4Ig) > B7B-H52E7

Human B7-H3 (4Ig) / B7-H3b Protein, His Tag (MALS verified)

INTRODUCTION
QC & Assay Protocol
Citation & Background
  • Synonym
    4Ig-B7-H3,B7-H3,CD276,PSEC0249,UNQ309,PRO352,B7 homolog 3
  • Source
    Human B7-H3 (4Ig), His Tag(B7B-H52E7) is expressed from human 293 cells (HEK293). It contains AA Gly 27 - Thr 461 (Accession # Q5ZPR3-1).
    Predicted N-terminus: Gly 27
    Request for sequence
  • Molecular Characterization
    B7-H3 (4Ig) Structure

    This protein carries a polyhistidine tag at the C-terminus.

    The protein has a calculated MW of 48.5 kDa. The protein migrates as 65-80 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >95% as determined by SDS-PAGE.

  • 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:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
B7-H3 (4Ig) SDS-PAGE

Human B7-H3 (4Ig), His Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.

SEC-MALS
B7-H3 (4Ig) MALS images

The purity of Human B7-H3 (4Ig), His Tag (Cat. No. B7B-H52E7) is more than 85% and the molecular weight of this protein is around 55-70 kDa verified by SEC-MALS.

Report
Bioactivity-ELISA
B7-H3 (4Ig) ELISA

Immobilized Human B7-H3 (4Ig), His Tag (Cat. No. B7B-H52E7) at 2 μg/mL (100 μL/well) can bind Monoclonal Anti-Human B7-H3 / B7-H3 (4Ig) Antibody, Human IgG1 with a linear range of 0.3-5 ng/mL (QC tested).

Protocol
B7-H3 (4Ig) ELISA

Immobilized Monoclonal Anti-Human B7-H3 / B7-H3 (4Ig) Antibody, Human IgG1 at 2 μg/mL (100 μL/well) can bind Human B7-H3 (4Ig), His Tag (Cat. No. B7B-H52E7) with a linear range of 1-10 ng/mL (Routinely tested).

Protocol
Bioactivity-BLI
B7-H3 (4Ig) BLI

Loaded Monoclonal Anti-Human B7-H3 / B7-H3 (4Ig) Antibody, Human IgG1 on Protein A Biosensor, can bind Human B7-H3 (4Ig), His Tag (Cat. No. B7B-H52E7) with an affinity constant of 1.74 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

Protocol
Bioactivity-Bioactivity CELL BASE
B7-H3 (4Ig) CELL

Human B7-H3 (4Ig), His Tag (Cat. No. B7B-H52E7) inhibits Anti-CD3-induced proliferation of PBMC. The EC50 for this effect is 7.95 μg/mL (Routinely tested).

Protocol
  • Background
    Human B7 homolog 3 (B7-H3) is a member of the B7 family of immune proteins that provide signals for the regulation of immune responses. Other family members include B7-1, B7-2, B7-H1/PD-L1, B7-H2, and PD-L2. B7 family proteins are type I transmembrane immunoglobulin (Ig) superfamily members that contain extracellular Ig V‑like and Ig C‑like domains with a short cytoplasmic tail. Termed 4IgB7-H3 or B7-H3b, this molecule has two additional Ig-like domains (one V‑type and one C‑type) and shows a ubiquituous expression pattern.
  • Clinical and Translational Updates

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