Barrel Image (IMAGE) Arizona State University Caption Arizona State University scientists show, for the first time, that a hinge migration mechanism, driven solely by long-range dynamic motions, can be the key for evolution of green to red phenotype in a green fluorescent protein. Credit Rebekka Wachter 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.