O-methylated flavonoid
The O-methylated flavonoids or methoxyflavonoids are flavonoids with methylations on hydroxyl groups. O-methylation has an effect on the solubility of flavonoids.
Enzymes
O-methylated flavonoids formation implies the presence of specific O-methyltransferase enzymes which accept a variety of substrates. Those enzymes mediate the O-methylation on a specific hydroxyl group, like on 4' or 3' positions. Those positions can be ortho, meta, para and there can be a special 3-O-methyltransferase for the 3-OH position. Calamondin orange exhibits all of those activities.Plant enzymes
- Apigenin 4'-O-methyltransferase
- 8-hydroxyquercetin 8-O-methyltransferase
- Isoflavone 4'-O-methyltransferase
- Isoflavone 7-O-methyltransferase
- Isoliquiritigenin 2'-O-methyltransferase
- Isoorientin 3'-O-methyltransferase
- Kaempferol 4'-O-methyltransferase
- Luteolin O-methyltransferase
- Methylquercetagetin 6-O-methyltransferase
- 3-methylquercetin 7-O-methyltransferase
- Myricetin O-methyltransferase
- Quercetin 3-O-methyltransferase
- Vitexin 2"-O-rhamnoside 7-O-methyltransferase
Animal enzyme
O-methylated anthocyanidins
- 5-Desoxy-malvidin
- Capensinidin
- Europinidin
- Hirsutidin
- Malvidin
- Peonidin
- Petunidin
- Pulchellidin
- Rosinidin
O-methylated flavanols
O-methylated flavanones
O-methylated flavanonols
''O''-methylated flavonols
of kaempferolof myricetin
of quercetin
other
O-methylated flavones
- Acacetin
- Chrysoeriol
- Diosmetin
- Nepetin
- Nobiletin
- Oroxylin-A
- Sinensetin
- Tangeritin
- Thevetiaflavone
- Wogonin