Bz-Lys-OH is widely used in peptide synthesis as a protecting group for the amino acid lysine. It helps in preventing unwanted side reactions during the formation of peptide bonds, ensuring the desired sequence is achieved. This compound is particularly valuable in the production of complex peptides and proteins for research and pharmaceutical development. Additionally, it finds application in the study of enzyme mechanisms and protein interactions, where controlled modification of lysine residues is required. Its stability and ease of removal make it a preferred choice in organic and biochemical laboratories.