Detail of GH3.5 active site (IMAGE) Washington University in St. Louis Caption Detail of the active site of GH3.5 determined by crystallizing the protein and bombarding it with X-rays. Auxin (lavender stick drawing), bound in the pocket, is being converted to an inactive form. Blue is nitrogen and red is oxygen. Credit Joe Jez 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.