Used in peptide synthesis as a building block, it enables selective protection of amino groups. The Fmoc group safeguards the lysine side chain, while the Alloc group protects the α-amino group, allowing for orthogonal deprotection strategies. This is particularly useful in solid-phase peptide synthesis, where sequential and controlled assembly of peptides is required. It is commonly employed in the production of complex peptides for pharmaceutical research, drug development, and biochemical studies. Its dual protection ensures high specificity and efficiency in constructing peptide chains with precise sequences.