COVID-19 viral protein image- 3D modeling (IMAGE) University of South Florida (USF Health) Caption Three configurations of active sites where inhibitor GC-376 binds with the COVID-19 virus's main protease (drug target Mpro), as depicted by 3D computer modeling. Credit Image generated by Yu Chen, University of South Florida Health, using X-ray crystallography Usage Restrictions Please use with appropriate caption. 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.