Used in biochemical research as a protease substrate or inhibitor, particularly in studies involving enzyme activity and protein degradation pathways. Its structure allows it to mimic natural peptide sequences, making it valuable in assays to monitor proteolytic enzyme function. Commonly applied in the development and testing of pharmaceuticals targeting protease enzymes, such as those involved in cancer, viral infections, or neurodegenerative diseases. Also utilized in affinity labeling and enzyme kinetics experiments due to its reactive pyrrolo moiety and peptide-like backbone.