Phe396 (VIDEO) DOE/Oak Ridge National Laboratory This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Watch the flipping conformations in a pair of phenylalanine amino acids called Phe396 (blue and red molecules), which act as a molecular switch essential to the signaling mechanism of an E. coli chemoreceptor. Credit Davi Ortega 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.