Fmoc-L-homoserine is widely used in peptide synthesis as a protecting group for the amino acid homoserine. It plays a crucial role in solid-phase peptide synthesis (SPPS) by preventing unwanted side reactions during the assembly of peptide chains. The Fmoc group can be easily removed under mild basic conditions, making it a preferred choice for constructing complex peptides. Additionally, it is utilized in the development of peptide-based drugs, biochemical research, and the study of protein structure and function. Its application extends to the synthesis of modified peptides and peptidomimetics, which are important in drug discovery and development.