ID   2.1.1.76
DE   Quercetin 3-O-methyltransferase.
AN   Flavonol 3-O-methyltransferase.
CA   S-adenosyl-L-methionine + 3,5,7,3',4'-pentahydroxyflavone = S-adenosyl-L-
CA   homocysteine + 3-methoxy-5,7,3',4'-tetrahydroxyflavone.
CC   -!- Specific for quercetin.
CC   -!- Related enzymes bring about the 3-O-methylation of other flavonols,
CC       such as galangin and kaempferol.
//