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Caffeine Vs Theobromine – Difference in Function

Both caffeine and theobromine are very similar molecules. But they only differ by a single methyl group! Theobromine, which mainly comes from the cacao tree, has two methyl groups attached to the nitrogen atoms in its original xanthine skeleton (an oxidized purine molecule much like guanosine).  Caffeine comes from the coffee plant, or Coffea arabica, […]

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