paraxanthine:S-adenosyl-L-methionine 3-N-methyltransferase activity (Q27863054)
Catalysis of the reaction: 1,7-dimethylxanthine + S-adenosyl-L-methionine <=> H+ + caffeine + S-adenosyl-L-homocysteine
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description Catalysis of the reaction: 1,7-dimethylxanthine + S-adenosyl-L-methionine <=> H+ + caffeine + S-adenosyl-L-homocysteine

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