spike mutation chart (IMAGE) Penn State Caption This schematic shows the difference in interactions between SARS-CoV and human ACE2 versus SARS-CoV-2 and human ACE2. Credit Ratul Chowdhury, Penn State Usage Restrictions non commercial use only 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.