Function
Catalyzes the stepwise methylation of tricetin to its 3'-mono- and 3',5'-dimethyl ethers. No 3',4',5'-trimethylated ester derivatives are produced. Can use caffeoyl-CoA, 5-hydroxyferulic acid, luteolin, tricetin, quercetin, myrcetin and 7,8-dihydroxyflavone as substrates, but not naringenin, apigenin or kaempferol. The 2,3-double bond and the O-dihydroxyl group of the substrate are both required for catalytic activity of the enzyme.