Tags: Enzyme.
In enzymology a quercetin 3-O-methyltransferase (EC 2.1.1.76) is an enzyme that catalyzes the chemical reactionS-adenosyl-L-methionine + 3573’4′-pentahydroxyflavone S-adenosyl-L-homocysteine + 3-methoxy-573’4′-tetrahydroxyflavoneThus the two substrates of this enzyme are S-adenosyl methionine and 3573’4′-pentahydroxyflavone whereas its two products are S-adenosylhomocysteine and 3-methoxy-573’4′-tetrahydroxyflavone.This enzyme belongs to the family of transferases specifically those transferring one-carbon group methyltransferases.