Boc-Lys-OH is widely used in peptide synthesis as a protected form of lysine. It serves as a key building block in the creation of peptides and proteins, ensuring the amino group of lysine remains protected during the synthesis process. This compound is particularly valuable in solid-phase peptide synthesis (SPPS), where it helps in constructing complex peptide chains with high precision. Additionally, it is utilized in the development of pharmaceutical compounds, including drugs targeting various diseases, due to its ability to maintain the integrity of the peptide structure. Its application extends to biochemical research, where it aids in studying protein interactions and functions.