Baudry (IMAGE) DOE/Oak Ridge National Laboratory Caption ORNL researchers used simulation to reveal how water molecules (seen in red) move in and out of the active site (seen in blue) of a P450 enzyme. This class of enzymes is responsible for detoxifying a large fraction of drugs taken by humans. Credit Jerome Baudry UT/ORNL 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.