Tags: Enzyme.
In enzymology a 3-demethylubiquinone-9 3-O-methyltransferase (EC 2.1.1.64) is an enzyme that catalyzes the chemical reactionS-adenosyl-L-methionine + 3-demethylubiquinone-9 S-adenosyl-L-homocysteine + ubiquinone-9Thus the two substrates of this enzyme are S-adenosyl methionine and 3-demethylubiquinone-9 whereas its two products are S-adenosylhomocysteine and ubiquinone-9.This enzyme belongs to the family of transferases specifically those transferring one-carbon group methyltransferases.