Editing ATP synthase (section)

=== Bacteria ===
''{{vanchor|E. coli}}'' ATP synthase is the simplest known form of ATP synthase, with 8 different subunit types.<ref name=ecoli>{{cite journal | vauthors = Ahmad Z, Okafor F, Laughlin TF | title = Role of Charged Residues in the Catalytic Sites of Escherichia coli ATP Synthase | journal = Journal of Amino Acids | volume = 2011 | pages = 785741 | year = 2011 | pmid = 22312470 | pmc = 3268026 | doi = 10.4061/2011/785741 | doi-access = free }}</ref>

Bacterial F-ATPases can occasionally operate in reverse, turning them into an ATPase.<ref name=pmid26671611>{{cite journal | vauthors = Kühlbrandt W, Davies KM | title = Rotary ATPases: A New Twist to an Ancient Machine | journal = Trends in Biochemical Sciences | volume = 41 | issue = 1 | pages = 106–116 | date = January 2016 | pmid = 26671611 | doi = 10.1016/j.tibs.2015.10.006 }}</ref> Some bacteria have no F-ATPase, using an A/V-type ATPase bidirectionally.<ref name=pmid24878343/>