Used in peptide synthesis as a building block for creating specific peptide sequences. It is particularly valuable in solid-phase peptide synthesis (SPPS) due to the Fmoc (fluorenylmethyloxycarbonyl) protecting group, which can be easily removed under mild basic conditions. This makes it suitable for constructing peptides with high precision and minimal side reactions. It is often employed in the development of pharmaceuticals, bioactive peptides, and research applications where controlled peptide assembly is required. Its structure, featuring phenylalanine (Phe) and glycine (Gly), contributes to its versatility in designing peptides with specific biological or structural properties.