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Hardie DG, Hawley SA (2001). «AMP-activated protein kinase: the energy charge hypothesis revisited». Bioessays. 23 (12): 1112–9. PMID11746230. doi:10.1002/bies.10009.
«'Nature's Batteries' May Have Helped Power Early Lifeforms». Science Daily. 25. mai 2010. Besøkt 26. mai 2010. «At any one time, the human body contains just 250g of ATP — this provides roughly the same amount of energy as a single AA battery. This ATP store is being constantly used and regenerated in cells via a process known as respiration, which is driven by natural catalysts called enzymes.»