English: Top: Adenosine triphosphate (ATP), a key biomolecule for storage of metabolic energy as well as synthesis of DNA. Bottom: 3ʼ-phospho-adenosine-5ʼ-phosphosulfate, abbreviated PAPS, is the cofactor for the sulfotransferase enzyme family. This shows the diversity with which life uses its limited substrates to achieve multiple goals.
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