Pentaglycine is widely used in the pharmaceutical and biotechnology industries as a peptide linker or spacer in drug delivery systems. It helps enhance the stability and efficacy of therapeutic compounds by providing a flexible connection between different molecular components. In microbiology, it serves as a substrate in enzymatic assays to study peptidase activity, aiding in the understanding of bacterial cell wall synthesis and degradation. Additionally, pentaglycine is utilized in the development of synthetic peptides for research purposes, particularly in studying protein-protein interactions and peptide-based vaccines. Its biocompatibility and versatility make it a valuable tool in various scientific and medical applications.