Isorhamnetin-3-O-rhamnoside was synthesized by a highly efficient three-enzyme (rhamnosyltransferase, glycine max sucrose synthase and uridine diphosphate (UDP)-rhamnose synthase) cascade using a UDP-rhamnose regeneration system. The rhamnosyltransferase gene (78D1) from Arabidopsis
A glucosyltransferase, which catalyses the glucosylation of flavonols, using uridine diphosphate-D-glucose as glucose donor, has been isolated and purified about 5-10 fold from cell suspension cultures of soybean (Glycine max L., var. Mandarin). The pH optimum for this reaction was ca. 8.5 in
O-methyltransferases (OMTs) catalyze the transfer of a methyl group from S-adenosine-L-methionine to a hydroxyl group of an acceptor molecule to form methyl ether derivatives and can modify the basic backbone of a secondary metabolite. A new O-methyltransferase, SOMT-9, was cloned from Glycine max
Chilling tolerance is an important trait of soybeans [Glycine max (L.) Merr.] produced in cool climates. We previously isolated a soybean flavonoid 3' hydroxylase (F3'H) gene corresponding to the T locus, which controls pubescence and seed coat color. A genetic link between the T gene and chilling
The distribution of flavonoids, isoflavonoids, and their conjugates in developing soybean (Glycine max L.) seedling organs and in root and seed exudates has been examined. Conjugates of the isoflavones daidzein and genistein are major metabolites in all embryonic organs within the dry seed and in
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