SARS-CoV-2 main protease (IMAGE) DOE/Oak Ridge National Laboratory Caption Overlapping X-ray data of the SARS-CoV-2 main protease shows structural differences between the protein at room temperature (orange) and the cryogenically frozen structure (white). Credit Jill Hemman/ORNL, U.S. Dept. of Energy Usage Restrictions Source to Oak Ridge National Laboratory 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.