Recombinant Rat Erbb2 Protein, Tag Free

• Cat.No.: Erbb2-11096R
• Product Overview: Rat Her2 Protein, Tag Free is expressed from human 293 cells (HEK293). It contains AA Thr 26 - Thr 656 (Accession # AAH61863.1). This protein carries no "tag". Predicted N-terminus: Thr 26

Specification

• Species: Rat
• Source: HEK293
• Tag: Non
• Protein Length: 26-656 aa
• Description: Human Epidermal Growth Factor Receptor 2 (HER2), also known as ErbB-2, is a cell membrane-bound receptor tyrosine kinase of the EGFR/ErbB family, encoded by the ERBB2 gene. It is crucial for cell growth and differentiation signaling. Uniquely, HER2 is an orphan receptor lacking a direct ligand, but forms highly active heterodimers with other ligand-bound ErbB family members, significantly amplifying oncogenic signals. Aberrant amplification or overexpression of the HER2/neu proto-oncogene is a key oncogenic driver. In breast cancer, approximately 25-30% of patients exhibit HER2 overexpression, leading to a more aggressive disease phenotype with faster growth, increased metastasis, and often reduced chemotherapy sensitivity. This correlates with poorer prognosis and makes HER2 a critical prognostic, predictive biomarker, and a major therapeutic target.
• Form: Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
• Molecular Mass: The protein has a calculated MW of 69.7 kDa. The protein migrates as 70 kDa and 80-95 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
• Endotoxin: Less than 1.0 EU/μg by the LAL method/rFC method.
• Purity: >95% as determined by SDS-PAGE. >90% as determined by SEC-MALS.
• Storage: This product is stable after storage at: -20 to -70 centigrade for 12 months in lyophilized state; -70 centigrade for 3 months under sterile conditions after reconstitution. For long term storage, the product should be stored at lyophilized state at -20 centigrade or lower. Please avoid repeated freeze-thaw cycles.
• Reconstitution: It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 μg/μL. Centrifuge the vial at 4 centigrade before opening to recover the entire contents.

Gene Information

• Gene Name: Erbb2 v-erb-b2 erythroblastic leukemia viral oncogene homolog 2, neuro/glioblastoma derived oncogene homolog (avian) [ Rattus norvegicus ]
• Official Symbol: ERBB2
• Synonyms: ERBB2; v-erb-b2 erythroblastic leukemia viral oncogene homolog 2, neuro/glioblastoma derived oncogene homolog (avian); receptor tyrosine-protein kinase erbB-2; p185neu; C-erbB-2; p185erbB2; NEU proto-oncogene; proto-oncogene NEU; proto-oncogene c-ErbB-2; epidermal growth factor receptor-related protein; Avian erythroblastosis viral (v-erb-B2) oncogene homologue 2 (neuro/glioblastoma derived oncogene homolog)
• Gene ID: 24337
• mRNA Refseq: NM_017003
• Protein Refseq: NP_058699
• UniProt ID: Q8K3F9

Q&As

Do you have a recommended protocol for immobilizing any avi-tagged recombinant proteins on a streptavidin coated plate?

1.Prepare the streptavidin-coated plate by washing it with PBS (phosphate-buffered saline) or another suitable buffer to remove any impurities. 2.Dilute the Avi-tagged protein in the desired buffer at the desired concentration. It is important to use a buffer that is compatible with the protein and does not interfere with its activity or stability. 3.Add the diluted protein to the streptavidin-coated plate and incubate it for a suitable amount of time at room temperature or 4°C. The exact conditions will depend on the specific protein and the desired level of immobilization. 4.Wash the plate with a suitable buffer to remove any unbound protein. 5.Block the remaining binding sites on the plate with a suitable blocking agent such as BSA (bovine serum albumin) or casein. 6.Wash the plate again to remove any unbound blocking agent. 7.Use the immobilized protein for further experiments such as ELISA, Western blotting, or other assays.