Used as a peptide building block in biochemical research, particularly in studies involving protein structure and enzyme activity. Its sequential glycine structure makes it useful for investigating protease cleavage patterns and peptide chain flexibility. Commonly employed in the development and calibration of analytical methods such as mass spectrometry and HPLC. Also utilized in some cell culture applications to support peptide synthesis and in the formulation of enzyme assays where a simple, defined oligopeptide substrate is required.