Qstatin is primarily utilized in biochemical research as a potent and selective inhibitor of protein-protein interactions, particularly those involving specific enzymes or signaling pathways. Its application is significant in studying cellular processes and identifying potential therapeutic targets for diseases where these interactions play a critical role, such as cancer or neurodegenerative disorders. Researchers also employ Qstatin to dissect complex biological networks and validate the function of specific proteins in experimental models. Its specificity makes it a valuable tool in drug discovery and development, aiding in the design of novel compounds that can modulate protein interactions with high precision.