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1982 (1)
1Author    G. Stotz, G. ForkmRequires cookie*
 Title    Hydroxylation of the B-Ring of Flavonoids in the 3'-and 5'-Position with Enzyme Extracts from Flowers of Verbena hybrida  
 Abstract    Enzyme preparations from flowers of Verbena hybrida do not only catalyse hydroxylation of the B-ring of flavanones and dihydroflavonols in the 3'-position but also in the 5'-position. Enzyme activity for 3',5'-hydroxylation was found to be localized in the microsomal fraction and required NADPH as cofactor. Evidence is provided that the formation o f the 3',4\5'-hydroxylated flavanone (5,7,3',4',5'-pentahydroxyflavanone) and dihydroflavonol (dihydromy-ricetin), respectively, proceeds via the corresponding 3',4'-hydroxylated compounds eriodictyol and dihydroquercetin, respectively, which are most probably formed by action o f the same enzyme. Enzyme activity for 3',5'-hydroxylation was found to be strictly correlated with the prescence of 3',4',5'-hydroxylated flavonoid compounds in the flowers. 
  Reference    Z. Naturforsch. 37c, 19—23 (1982); received October 141981 
  Published    1982 
  Keywords    Anthocyanins, Flavonoids, Biosynthesis, Flavonoid 3', 5'-Hydroxylation, Verbena hybrida 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0019.pdf 
 Identifier    ZNC-1982-37c-0019 
 Volume    37