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Your Position: 홈 > Protein > Her2 > HE2-HF224

FITC-Labeled Human Her2 / ErbB2 Protein, His Tag

INTRODUCTION
QC & Assay Protocol
Citation & Background
  • Synonym
    ERBB2,CD340,HER-2,neu,HER2,MLN19,NEU,NGL,TKR1
  • Source
    FITC-Labeled Human Her2, His Tag (HE2-HF224) is expressed from human 293 cells (HEK293). It contains AA Thr 23 - Thr 652 (Accession # P04626-1). It is the FITC labeled form of Human Her2, His Tag (HE2-H5225).
    Predicted N-terminus: Thr 23
    Request for sequence
  • Molecular Characterization
    Her2 Structure

    This protein carries a polyhistidine tag at the C-terminus

    The protein has a calculated MW of 70.2 kDa. The protein migrates as 80-100 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Conjugate

    FITC

    Excitation source: 488 nm spectral line, argon-ion laser

    Excitation Wavelength: 488 nm

    Emission Wavelength: 535 nm

  • Labeling
    The primary amines in the side chains of lysine residues and the N-terminus of the protein are conjugated with FITC using standard chemical labeling method. The residual FITC is removed by molecular sieve treatment during purification process.
  • Protein Ratio
    The FITC to protein molar ratio is 1.5-2.5.
  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >90% 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 protect from light and 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
Her2 SDS-PAGE

FITC-Labeled Human Her2, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90%.

Bioactivity-ELISA
Her2 ELISA

Immobilized Trastuzumab at 0.5 μg/mL (100 μL/well) can bind FITC-Labeled Human Her2, His Tag (Cat. No. HE2-HF224) with a linear range of 0.02-0.313 μg/mL (QC tested).

Protocol
Bioactivity-FACS
Her2 FACS

2e5 of Anti-Her2 CAR-293 were stained with 100 μL of 1 μg/mL of FITC-Labeled Human Her2, His Tag (Cat. No. HE2-HF224) and negative control protein respectively, FITC signal was used to evaluate the binding activity (QC tested).

Protocol
  • Background
    Human Epidermal growth factor Receptor 2 (HER2) is also called ERBB2, HER-2,HER-2 /neu, NEU, NGL,TKR1 and c-erb B2,and is a protein giving higher aggressiveness in breast cancers. It is a member of the ErbB protein family, more commonly known as the epidermal growth factor receptor family. HER2 is a cell membrane surface-bound receptor tyrosine kinase and is normally involved in the signal transduction pathways leading to cell growth and differentiation. HER2 is thought to be an orphan receptor, with none of the EGF family of ligands able to activate it. Approximately 30% of breast cancers have an amplification of the HER2 gene or overexpression of its protein product. Overexpression of this receptor in breast cancer is associated with increased disease recurrence and worse prognosis. HER2 appears to play roles in development, cancer, communication at the neuromuscular junction and regulation of cell growth and differentiation .
  • Clinical and Translational Updates

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