Used in peptide synthesis, particularly in the development of modified peptides and peptidomimetics. Its D-configuration and Fmoc protection make it suitable for solid-phase synthesis where stereochemical control is required. The aminoadipic acid side chain provides a carboxylic acid handle for further functionalization, enabling conjugation to carriers, labels, or solid supports. Commonly applied in research settings for creating antigenic peptides, enzyme inhibitors, and probes for biochemical studies. The Fmoc group allows for mild, base-labile deprotection, compatible with standard peptide synthesis protocols.