cAMP, highly conserved throughout evolution,

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Cyclic AMP (cAMP) is involved in various cellular processes across different organisms. It indicates cellular energy states by acting as a secondary messenger in signaling pathways, including those that mobilize energy. In prokaryotes, cAMP levels increase when glucose is absent, playing a crucial role in the activation of genes involved in the metabolism of alternative sugar sources. This broad range of functions across both eukaryotic and prokaryotic organisms highlights its evolutionary conservation and importance in cellular biology.

CAMP, Highly Conserved Throughout Evolution