ZTL Protein Structure (IMAGE) Southern Methodist University Caption The structure of ZTL that enabled the researchers to map both the changes in shape and changes in chemistry that allow plants to adapt to their environment. Credit (Credit: Zoltowski) Usage Restrictions Please credit. 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.