AUTHOR=Baykov Alexander A. TITLE=Energy Coupling in Cation-Pumping Pyrophosphatase—Back to Mitchell JOURNAL=Frontiers in Plant Science VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2020.00107 DOI=10.3389/fpls.2020.00107 ISSN=1664-462X