Used primarily in peptide synthesis as a building block for creating complex peptide structures. It serves as a protected amino acid derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group protects the amine functionality, and the Alloc (allyloxycarbonyl) group protects the side chain amine. This dual protection allows for selective deprotection during solid-phase peptide synthesis, enabling the stepwise assembly of peptides. It is particularly valuable in producing peptides with specific sequences or modifications for research in biochemistry, drug development, and therapeutic applications. Its stereochemistry also ensures the correct spatial arrangement of the peptide chain, which is crucial for biological activity.