Z-Lys(Z)-OH is widely used in peptide synthesis as a protected form of lysine. It serves as a key building block in the production of peptides, ensuring the lysine side chain remains protected during the synthesis process. This compound is particularly valuable in solid-phase peptide synthesis (SPPS), where it helps in constructing complex peptides with high precision. It is also employed in the development of peptide-based drugs, vaccines, and biochemical research tools. Its protective groups can be selectively removed under specific conditions, allowing for controlled and efficient peptide chain elongation. Additionally, it finds applications in the study of protein interactions and enzyme mechanisms due to its stable and reactive properties.