Early bioenergetic evolution.

Philos Trans R Soc Lond B Biol Sci · 2013 · PMC3685469 · PMID 23754820

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possibly significantno p-value reported

This is an interesting and possibly significant point, suggesting that much went on in early biochemistry before ATP became a common currency.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.