  2.1.1.155 | S-adenosyl-L-methionine + kaempferol = S-adenosyl-L-homocysteine + kaempferide |
the enzyme acts on the hydroxy group in the 4'-position of some flavones, flavanones and isoflavones, kaempferol, apigenin and kaempferol triglucoside are substrates, as is genistein, which reacts more slowly, compounds with a hydroxy group in the 3' and 4' positions, such as quercetin and eriodictyol, do not act as substrates, similar to EC 2.1.1.75, apigenin 4'-O-methyltransferase and EC 2.1.1.83, 3,7-dimethylquercitin 4'-O-methyltransferase, ping-pong mechanism excluding the formation of a ternary complex |
655462 |
