ID 2.1.1.153 DE vitexin 2''-O-rhamnoside 7-O-methyltransferase. CA S-adenosyl-L-methionine + vitexin 2''-O-beta-L-rhamnoside = 7-O- CA methylvitexin 2''-O-beta-L-rhamnoside + H(+) + S-adenosyl-L-homocysteine. CC -!- The flavonoids vitexin and isovitexin 2''-O-arabinoside do not act as CC substrates for the enzyme from oats (Avena sativa). //