Motion on Potentials (IMAGE) National Institutes of Natural Sciences Caption Fig. 2. (A) Unidirectional motion observed by single-molecule imaging of chitinase. (B) Chemical-state-dependent free energy profiles estimated from the imaging data. Credit NINS/IMS Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.