Pro-Gln-OH is widely used in the field of peptide synthesis and biochemical research. It serves as a building block for creating more complex peptides and proteins, particularly in studies involving cell signaling and protein interactions. Its structure makes it valuable in designing peptides that mimic natural biological processes, aiding in drug development and therapeutic research. Additionally, it is utilized in the study of enzyme mechanisms and as a substrate for various proteolytic enzymes. Its application extends to the development of bioactive peptides with potential uses in treating diseases or enhancing physiological functions.