This chemical is commonly used in peptide synthesis as a protected form of lysine. The acetyl (Ac) group protects the amino group, while the benzyloxycarbonyl (Z) group protects the side chain amine of lysine, preventing unwanted reactions during peptide bond formation. It is particularly useful in solid-phase peptide synthesis (SPPS) to ensure precise and controlled assembly of peptide sequences. After synthesis, the protecting groups can be selectively removed to yield the desired peptide. Its application is essential in producing peptides for research, pharmaceuticals, and biotechnology, where specific amino acid sequences are critical.