Editing Adenosine triphosphate (section)

===ATP recycling===
The total quantity of ATP in the human body is about 0.1&nbsp;[[Molar concentration|mol/L]].<ref name="Fuhrman-1061">{{cite book |last1=Fuhrman |first1=Bradley P. |last2=Zimmerman |first2=Jerry J. |title=Pediatric Critical Care |date=2011 |publisher=Elsevier |isbn=978-0-323-07307-3 |pages=1061 |url=https://www.sciencedirect.com/science/article/pii/B9780323073073100746#s0025 |access-date=16 May 2020}}</ref> The majority of ATP is recycled from ADP by the aforementioned processes. Thus, at any given time, the total amount of ATP + ADP remains fairly constant.

The energy used by human cells in an adult requires the hydrolysis of 100 to 150&nbsp;mol/L of ATP daily, which means a human will typically use their body weight worth of ATP over the course of the day.<ref name="Fuhrman">{{cite book |last1=Fuhrman |first1=Bradley P. |last2=Zimmerman |first2=Jerry J. |title=Pediatric Critical Care |date=2011 |publisher=Elsevier |isbn=978-0-323-07307-3 |pages=1058–1072 |url=https://www.sciencedirect.com/science/article/pii/B9780323073073100746#s0025 |access-date=16 May 2020}}</ref> Each equivalent of ATP is recycled 1000–1500 times during a single day ({{nowrap|150 / 0.1 {{=}} 1500}}),<ref name="Fuhrman-1061" /> at approximately 9×10<sup>20</sup> molecules/s.<ref name="Fuhrman-1061" />

[[Image:Rossmann-fold-1g5q.png|thumb|An example of the Rossmann fold, a [[structural domain]] of a [[decarboxylase]] enzyme from the bacterium ''[[Staphylococcus epidermidis]]'' ({{PDB|1G5Q}}) with a bound [[flavin mononucleotide]] cofactor]]