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Where does the ADP come from? As in before ADP was made from ATP and visa-versa how is it conceived that they appeared in nature?

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closed as unclear what you're asking by mgkrebbs, David, The Last Word, Roland, Bryan Krause Sep 4 '18 at 17:25

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  • $\begingroup$ You can't synthesize ADP from just hydrogen; it also requires carbon, oxygen, nitrogen and phosphorous. $\endgroup$ – mgkrebbs Aug 25 '18 at 3:23
  • $\begingroup$ Cool so step 1, carbon oxygen nitrogen and phosphorous are all created through fusion from products up from hydrogen. That star eventually yields iron and explodes, what happens next? $\endgroup$ – kpie Aug 26 '18 at 5:22
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Adenosine diphosphate is a nucleotide, specifically a purine nucleotide, since it contains a double ring. These nucleotides are synthesized by cells from amino acids and other nutrients in a rather long and complicated biochemical pathway. You can find information about this pathway in any biochemical textbook, or see this page in Wikipedia.

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  • $\begingroup$ Your answer is inadequate because it assumes the preexistence of the product. $\endgroup$ – kpie Aug 26 '18 at 4:37
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    $\begingroup$ @kpie No, it doesn't. The purines are synthesized from simpler building blocks, like amino acids. I suggest you read up on the biosynthesis pathway. $\endgroup$ – Roland Aug 27 '18 at 13:31
  • $\begingroup$ ATP -> ADP provides energy at several junctures of the pathways you referenced. like you can't synthesize IMP without ATP, and you can't get credit for answering this question without actually answering it. I'm pretty much looking for someone to layout their theories on life and here you are diminishing the question with your ego. $\endgroup$ – kpie Aug 30 '18 at 13:42

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