Carcinoembryonic antigen-related cell adhesion molecule 5 (625-639)

Carcinoembryonic antigen-related cell adhesion molecule 5 (625-639) is a synthetic peptide fragment corresponding to amino acids 625 through 639 of the CEACAM5 protein, a member of the immunoglobulin superfamily known for its roles in cell adhesion, intercellular signaling, and modulation of immune responses. As a peptide derived from a highly studied region of CEACAM5, it serves as a valuable tool for elucidating the molecular mechanisms underlying cell-cell interactions, particularly in the context of cancer biology and immunological research. The sequence's specificity and defined structure make it particularly suitable for applications in biochemical assays, antibody development, and functional studies examining the role of CEACAM5 in various cellular processes.

Epitope mapping: The peptide is commonly utilized in epitope mapping studies to identify and characterize antibody binding sites on the CEACAM5 protein. By providing a precise and accessible segment of the native protein, it allows researchers to dissect linear and conformational epitopes, facilitating the development of monoclonal and polyclonal antibodies with high specificity. Such mapping is instrumental for both diagnostic assay development and for advancing understanding of immune recognition mechanisms.

Antibody validation: In immunological research, the 625-639 peptide fragment is frequently employed as a positive control or antigen in antibody validation protocols. Its use enables the verification of antibody specificity and sensitivity, ensuring that reagents selectively recognize the intended region of CEACAM5. This is particularly important for the quality assurance of antibodies used in immunohistochemistry, Western blotting, and ELISA platforms.

Peptide-based assay development: As a well-defined synthetic peptide, this fragment supports the design and optimization of peptide-based assays, including competitive binding assays and peptide ELISAs. Such assays are valuable for quantifying antibody or ligand interactions, screening for small molecule inhibitors, and investigating the functional relevance of the CEACAM5 625-639 region in cell adhesion and signaling pathways.

Cancer biomarker research: The CEACAM5 protein, and by extension its specific peptide regions, is widely studied as a biomarker in oncology research. The 625-639 fragment can be used to probe the presence and distribution of CEACAM5 in cell lines or tissue extracts, aiding in the exploration of its expression patterns, post-translational modifications, and potential roles in tumor progression and metastasis. This supports efforts to better understand the molecular basis of cancer cell behavior.

Peptide-protein interaction studies: The defined sequence of the 625-639 peptide allows for detailed investigation of peptide-protein interactions involving CEACAM5. By serving as a target or bait in binding assays, it enables the identification of interacting partners, mapping of binding affinities, and structural studies using techniques such as surface plasmon resonance or NMR spectroscopy. Insights gained from these studies contribute to a deeper understanding of the molecular networks in which CEACAM5 participates, particularly in the context of cell adhesion and immune modulation.

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