Used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) as a building block. The Fmoc group protects the amino group during the synthesis process, while the Aloc group safeguards the side chain of lysine, allowing selective deprotection. This enables the controlled assembly of complex peptides, making it valuable in the production of therapeutic peptides, research peptides, and peptidomimetics. Its application is crucial in developing drugs, studying protein interactions, and designing bioactive molecules.