Reaction catalyzed by flavone 3'-O-methyltransferase (2.1.1.42), tricetin 3',4',5'-O-trimethyltransferase (2.1.1.169)
+
=
+
S-adenosyl-L-methionine
+
3'-hydroxyflavone
=
S-adenosyl-L-homocysteine
+
3'-methoxyflavone