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Excellent question! And I honestly don’t know. But from a quick google search I gather that adenosine is continuously metabolized by the enzyme adenosine deaminase and caffeine by the enzyme CYP1A2. Although I’m not sure if these enzymes act upon adenosine/caffeine while they are attached to the receptors…

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David B. Clear
David B. Clear

Written by David B. Clear

Cartoonist, science fan, PhD, eukaryote. Doesn't eat cats, dogs, nor other animals. 1,000x Bottom Writer. davidbclear.com

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