Used in peptide synthesis as a building block for creating complex peptides and proteins. It is particularly valuable in solid-phase peptide synthesis (SPPS) due to the Fmoc (fluorenylmethyloxycarbonyl) protecting group, which can be easily removed under mild conditions. The methoxy group on the homophenylalanine side chain can influence the peptide's properties, such as solubility and binding affinity, making it useful in drug development and biochemical research. It is also employed in the study of enzyme-substrate interactions and the design of peptide-based therapeutics.