AUTHOR=Leitão Ana Lúcia , Enguita Francisco J. TITLE=Editorial: Secondary metabolism: an unlimited foundation for synthetic biology, volume II JOURNAL=Frontiers in Microbiology VOLUME=14 YEAR=2023 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2023.1200928 DOI=10.3389/fmicb.2023.1200928 ISSN=1664-302X