Cryo-EM Structure (IMAGE) Peking University Caption (A&B) Cryo-EM structure of BD-23 Fab in complex with the Spike-ectodomain trimer (C) RBD/ACE2 complex structure overlays with RBD/ BD-23 Fab structure, which demonstrates BD-23 Fab can block S protein binding with ACE2. Credit Beijing Advanced Innovation Center for Genomics, Biomedical Pioneering Innovation Center, Peking University 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.