Since phage display allows the study of protein-ligand interactions, its applications are quite diverse. One of the most important applications of phage display can be found in the field of antibody discovery. Allied to naïve, immune, or synthetic libraries, phage display can help researchers finding antibodies with novel functions for therapeutic, diagnostics, and research applications.
Another use of this technology lies in antibody engineering and lead optimization. Phage display has been extensively used as a tool to optimize antigen selectivity (cross-reactivity), affinity, and developability. This is recurrently achieved by building synthetic libraries obtained from computational or experimental mutagenesis (random or site-directed), enriching promising variants, and screening their activity in the desired conditions and application.
Finally, phage display has been recently gaining interest as a tool for epitope mapping. By displaying peptides or proteins against a single purified antibody, it is possible to determine its epitope-specificity – invaluable information when developing particularly complex therapies like oligoclonal antibodies (antibody cocktails) or antibody pairs for Sandwich ELISA tests.
To learn more about the applications of phage display, read the complete article: What are the applications of phage display?