LAUSR

Summary Enzymes play a key role in many bioprocesses associated with diseases, and observation of enzyme dynamics in living bodies has become meaningful for understanding enzyme function. Thus, in situ real-time fluorescence imaging can prove to be a powerful tool for monitoring enzyme dynamics, enabling detailed understanding of changes in the activity and function of enzymes. This perspective summarizes the existing methods for in situ real-time fluorescence imaging of enzymes in vivo and discusses remaining challenges. This perspective is intended to encourage chemists and chemical engineers to develop additional methods for the in situ real-time monitoring of enzymes in complex biosystems.