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Your Position: Home > Protein > ErbB3 > ER3-H8223

Biotinylated Human ErbB3 / Her3 Protein, His Tag, ultra sensitivity (primary amine labeling) (MALS verified)

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Based on the high binding affinity between biotin-streptavidin systems, our Streptavidin series products are recommended to use together with biotinylated proteins to get lower non-specific binding results in a shorter time.

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  • Synonym
    ERBB3,HER3,LCCS2,MDA-BF-1,MGC88033,c-erbB3,erbB3-S,p180-ErbB3,p45-sErbB3,p85-sErbB3
  • Source
    MABSol® Biotinylated Human ErbB3, His Tag, primary amine labeling (ER3-H8223) is expressed from human HEK293 cells. It contains AA Ser 20 - Thr 643 (Accession # NP_001973.2 ). It is the biotinylated form of Human ErbB3, His Tag (ER3-H5223).
    Predicted N-terminus: Ser 20
  • Molecular Characterization
    ErbB3 Structure

    This protein carries a polyhistidine tag at the C-terminus

    The protein has a calculated MW of 69.5 kDa. The protein migrates as 85-95 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Labeling
    The primary amines in the side chains of lysine residues and the N-terminus of the protein are conjugated with biotins using standard chemical labeling method. A standard biotin reagent (13.5 angstroms) is used in this product.
  • Protein Ratio
    Passed as determined by the HABA assay / binding ELISA.
  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >95% as determined by SDS-PAGE.

    >90% 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:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 6 months under sterile conditions after reconstitution.
SDS-PAGE
ErbB3 SDS-PAGE

Biotinylated Human ErbB3, His Tag, primary amine labeling 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
ErbB3 MALS images

The purity of Biotinylated Human ErbB3, His Tag, primary amine labeling (Cat. No. ER3-H8223) is more than 90% and the molecular weight of this protein is around 100-120 kDa verified by SEC-MALS.

Bioactivity-ELISA
 ErbB3 ELISA

Immobilized Biotinylated Human ErbB3, His Tag, primary amine labeling (Cat. No. ER3-H8223) at 1 μg/mL (100 μL/well) on Streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate, can bind Human NRG1 Beta 1, Fc Tag, premium grade (Cat. No. NR1-H5268) with a linear range of 0.5-8 ng/mL (QC tested).

  • Background
    ErbB3,also known as Her3 (human epidermal growth factor receptor 3), is a member of the epidermal growth factor receptor (EGFR) family of receptor tyrosine kinases. This membrane-bound glycoprotein has a neuregulin binding domain but has not an active kinase domain. It therefore can bind the ligand but cannot mediate the intracellular signal transduction through protein phosphorylation. However, it does form heterodimers with ErbB2 or other EGFR members responsible for tyrosine phosphorylation to give a receptor complex and initiate the related pathway, which lead to cell proliferation or differentiation. Overexpression of this protein has been reported in numerous cancers, including prostate, bladder, and breast tumors. This protein has different isoforms derived from alternative splicing variants, and among which, the secreted isoform lacking the intermembrane region modulates the activity of membrane-bound form.
  • Clinical and Translational Updates

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