HER-2/neu (85–94)

HER-2/neu (85-94) is a synthetic peptide corresponding to amino acids 85 through 94 of the human epidermal growth factor receptor 2 (HER2/neu) protein, a well-characterized member of the ErbB family of receptor tyrosine kinases. This peptide sequence is derived from an intracellular region of the HER2 protein, which is widely studied for its pivotal role in cell signaling, growth regulation, and oncogenic transformation. As a research reagent, HER-2/neu (85-94) provides a defined molecular tool for investigating HER2-related cellular mechanisms, facilitating studies in oncology, immunology, and molecular signaling pathways.

Epitope mapping: The peptide is frequently utilized in epitope mapping experiments to identify and characterize antibody binding sites within the HER2 protein. By providing a precise linear sequence, it enables researchers to dissect immune recognition patterns, validate monoclonal antibody specificity, and elucidate the fine structure of antigen-antibody interactions. Such mapping studies are essential for the development and refinement of antibody-based detection systems and for understanding immune targeting in HER2-positive malignancies.

T cell response studies: As a defined HER2-derived peptide, HER-2/neu (85-94) serves as a valuable reagent for analyzing peptide-specific T cell responses in vitro. It can be employed to assess the activation, proliferation, and cytokine production of CD8+ or CD4+ T cells in the context of antigen presentation assays. These investigations are crucial for understanding immune surveillance mechanisms in cancer, evaluating immunogenicity, and supporting the design of immunotherapeutic strategies targeting HER2-expressing cells.

Peptide-based assay development: The peptide is often incorporated into various immunoassay platforms, including ELISpot, ELISA, and flow cytometry-based assays, to quantify antigen-specific immune responses. By serving as a standardized analyte or coating antigen, HER-2/neu (85-94) facilitates the measurement of T cell or antibody reactivity, supporting both basic research and translational studies in tumor immunology and biomarker discovery.

Signal transduction research: Researchers use the peptide to probe the functional domains of HER2 involved in intracellular signaling cascades. By introducing this sequence into biochemical assays or cell-based models, it is possible to investigate its role in kinase activity, phosphorylation events, or protein-protein interactions. Such studies contribute to a deeper understanding of HER2-mediated signal transduction and its implications in cellular proliferation and transformation.

Peptide synthesis and validation: HER-2/neu (85-94) is also valuable as a reference standard or positive control in the synthesis and analytical validation of HER2-related peptides. Its defined sequence and well-characterized properties make it suitable for calibrating peptide purification protocols, optimizing mass spectrometry workflows, and benchmarking analytical techniques used in proteomics and peptide research. This application supports the reproducibility and reliability of experimental results in laboratories focused on peptide chemistry and molecular oncology.

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