2.1.1.42	4 S-adenosyl-L-methionine + quercetin	-	Citrus depressa	4 S-adenosyl-L-homocysteine + 3,3',5,7-tetra-O-methyl-quercetin	-	?	455025	
2.1.1.42	luteolin + S-adenosyl-L-methionine	high 3'-O-methyltransferase activity	Glycine max	3'-O-methyl luteolin + S-adenosyl-L-homocysteine	i.e. chrysoeriol	?	389110	
2.1.1.42	luteolin + S-adenosyl-L-methionine	OMT-15 shows 92% activity and OMT-17 shows 84% activity compared to myricetin	Oryza sativa	3'-O-methylluteolin + S-adenosyl-L-homocysteine	-	?	409782	
2.1.1.42	additional information	-	Petroselinum crispum	?	-	?	89	
2.1.1.42	additional information	isomeric substances isoferulic acid and diosmetin, chrysoeriol, apigenin p-cumaric acid and ferulic acid are not substrates	Petroselinum crispum	?	-	?	89	
2.1.1.42	additional information	only ortho-dihydric phenols can function as substrates and only the meta-hydroxyl group is methylated, no reaction takes place if one of the two phenolic hydroxyls is methylated or if only one hydroxyl group is present	Petroselinum crispum	?	-	?	89	
2.1.1.42	additional information	rutin is no substrate	Nicotiana tabacum	?	-	?	89	
2.1.1.42	additional information	methylation proceedes only in the meta-position, enzyme is unable to catalyze the methylation of p-coumaric acid, m-coumaric acid, ferulic acid, isoferulic acid, sinapic acid, apigenin and naringenin	Glycine max	?	-	?	89	
2.1.1.42	additional information	isoflavones biochanin A and daidzein do not serve as substrates	Glycine max	?	-	?	89	
2.1.1.42	additional information	SOMT-9 transfers a methyl group to the 3'-OH group of substrates having ortho-hydroxyl groups and uses a flavonoids as a substrates, no activity with 3,3'-dihydroxyflavone, 5,3'-dihydroxyflavone, 6,3'-dihydroxyflavone, 3'-hydroxyflavone, and 3'-hydroxyflavanone	Glycine max	?	-	?	89