Fmoc-Orn(Z)-OH is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected amino acid derivative, where the Fmoc group safeguards the amino group, and the Z group protects the side chain of ornithine. This compound is essential for constructing peptides with specific sequences, especially those requiring ornithine residues. Its application is critical in the development of bioactive peptides, pharmaceuticals, and research tools in biochemistry and molecular biology. The protective groups ensure selective reactions during peptide chain assembly, enabling precise and efficient synthesis.