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| O-methylated flavanol ： ウィキペディア英語版 |
O-methylated flavonoid
The O-methylated flavonoids or methoxyflavonoids are flavonoids with methylations on hydroxyl groups (methoxy bonds). O-methylation has an effect on the solubility of flavonoids.
==Enzymes==
O-methylated flavonoids formation implies the presence of specific O-methyltransferase (OMT) enzymes which accept a variety of substrates. Those enzymes mediate the O-methylation on a specific hydroxyl group, like on 4' (example in ''Catharanthus roseus'') or 3' (example in rice) positions. Those positions can be ortho, meta, para and there can be a special 3-O-methyltransferase for the 3-OH position. Calamondin orange (''Citrus mitis'') exhibits all of those activities.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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