Editing Adenosine diphosphate (section)

===Citric acid cycle===
{{main|citric acid cycle}}
The [[citric acid cycle]], also known as the Krebs cycle or the TCA (tricarboxylic acid) cycle is an 8-step process that takes the pyruvate generated by glycolysis and generates 4 NADH, FADH2, and GTP, which is further converted to ATP.<ref>{{cite web|title=Citric Acid Cycle |url=http://web.ku.edu/~crystal/taksnotes/Biol_638/notes/chp_16.pdf |publisher=Takusagawa’s Note |access-date=4 April 2013 |url-status=dead |archive-url=https://web.archive.org/web/20120324072437/http://web.ku.edu/~crystal/taksnotes/Biol_638/notes/chp_16.pdf |archive-date=24 March 2012 }}</ref> It is only in step 5, where GTP is generated, by succinyl-CoA synthetase, and then converted to ATP, that ADP is used (GTP + ADP → GDP + ATP).<ref>{{cite web|title=Biochemistry |url=http://www.uccs.edu/~sbraunsa/Images/482Notes/17-TCAcycle.pdf |publisher=UCCS.edu |url-status=dead |archive-url=https://web.archive.org/web/20130228175004/http://www.uccs.edu/~sbraunsa/Images/482Notes/17-TCAcycle.pdf |archive-date=2013-02-28 }}</ref>
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