Enzyme Activity (IMAGE) National Institutes of Natural Sciences Caption Mutations of a PET hydrolyzing enzyme PET2 resulted in a 6.7 degrees C increase in thermal stability and a 6.8-fold increase in PET hydrolytic activity. T<sub>m</sub> represents melting (denaturation) temperature and colors on enzyme structures show their surface charges (blue: positive, red: negative). 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.