AUTHOR=Li Zongli TITLE=Editorial: Methods in structural biology: Cryo-electron microscopy JOURNAL=Frontiers in Molecular Biosciences VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/molecular-biosciences/articles/10.3389/fmolb.2022.1041386 DOI=10.3389/fmolb.2022.1041386 ISSN=2296-889X