Receptor tyrosine-protein kinase erbB-2 (63-71)

Receptor tyrosine-protein kinase erbB-2 (63-71) is a synthetic peptide fragment derived from the human HER2/neu protein, a member of the epidermal growth factor receptor (EGFR) family. Comprising amino acids 63 to 71 of the erbB-2 sequence, this peptide represents a defined epitope within the extracellular domain of the receptor. The HER2/neu protein is a critical mediator of cellular signaling pathways involved in cell growth, differentiation, and survival, making its peptide fragments valuable tools for a range of biochemical and molecular biology investigations. The unique sequence of erbB-2 (63-71) enables researchers to probe specific molecular interactions, study protein function, and develop targeted assays relevant to cell signaling and oncology research.

Epitope mapping: As a well-characterized segment of the HER2/neu extracellular domain, the erbB-2 (63-71) peptide is frequently utilized in epitope mapping studies. Researchers employ this peptide to identify and characterize antibody binding sites, facilitating the development of monoclonal antibodies with defined specificity. Such mapping is essential for understanding immune recognition of HER2/neu and for designing targeted detection reagents in immunoassays.

Antibody validation: The defined sequence of this peptide allows for rigorous validation of anti-HER2/neu antibodies. By serving as a positive control in enzyme-linked immunosorbent assays (ELISA), western blotting, or immunoprecipitation experiments, the peptide supports the assessment of antibody specificity and cross-reactivity. This function is crucial for ensuring the reliability of immunodetection tools used in both basic research and translational studies.

Peptide-based assay development: The erbB-2 (63-71) fragment is instrumental in the development and optimization of peptide-based assays designed to quantify or detect HER2/neu or its immune response. Its use in competitive binding assays, peptide arrays, or multiplex immunoassays enables precise measurement of antibody titers, peptide-protein interactions, or immune profiling. Such assays are vital for biomarker discovery and validation in oncology and immunology research.

Signal transduction studies: As a representative motif from the HER2/neu receptor, this peptide can be employed to dissect signaling pathways involving erbB-2. By serving as a substrate or competitive inhibitor in kinase assays or protein interaction studies, it aids in elucidating the mechanisms of receptor activation, downstream signaling cascades, and protein-protein interactions. Insights gained from these studies contribute to a deeper understanding of cell signaling dynamics in both normal and pathological contexts.

Peptide synthesis and modification research: The erbB-2 (63-71) peptide serves as a model substrate for peptide synthesis, modification, and conjugation studies. Researchers leverage its defined sequence to explore techniques such as site-specific labeling, cyclization, or conjugation to carrier proteins. These investigations not only enhance synthetic peptide methodology but also inform the design of peptide-based probes, diagnostics, or research reagents targeting HER2/neu and related signaling proteins.

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