NendoU (IMAGE) Arizona State University Caption Image of NendoU, a protein used by the SARS CoV-2 virus to hide from the immune system. NendoU performs this feat by binding with viral RNA in the infected cell and cutting off a terminal portion of the sequence that the immune system uses to identify the presence of a foreign invader. Credit Worldwide Protein Data Bank Usage Restrictions No restrictions. License Public Domain 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.