IgG bivalency enhances neutralization against enveloped viruses, but its on-virion structural details remain unclear. Here, authors use cryo-ET to reveal that two anti-RBD IgGs, P17 and S309, form diverse S-IgG bivalent binding modes, distinct higher-order assemblies, and inter-virion cross-linking on SARS-CoV-2 S protein.
- Hangping Yao
- Yutong Song
- Sai Li