AUTHOR=Potrykus Katarzyna , Cashel Michael , Bange Gert TITLE=Editorial: (p)ppGpp and Its Homologs: Enzymatic and Mechanistic Diversity Among the Microbes JOURNAL=Frontiers in Microbiology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2021.658282 DOI=10.3389/fmicb.2021.658282 ISSN=1664-302X