chrysosplenium/7 glucoside

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Tissue culture of Chrysosplenium americanum and its potential for flavonoid production.

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Chrysosplenium americanum (Saxifragaceae) accumulates a variety of partially O-methylated flavonol glucosides. Because of the semi-aquatic nature of this plant and its extensive contamination with endogenous organisms, the initiation of shoot and callus cultures could only be achieved after (a)

Kinetic mechanism of a flavonol-ring-B O-glucosyltransferase from Chrysosplenium americanum.

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The kinetic mechanism of a flavonol-ring-B O-glucosyltransferase from Chrysosplenium americanum was investigated. Substrate interaction kinetics for the flavonol and UDPG gave converging lines, which were consistent with a sequential bireactant binding mechanism. They also showed substrate

Purification and Properties of Flavonol-Ring B Glucosyltransferase from Chrysosplenium americanum.

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A novel glucosyltransferase which catalyzed the transfer of glucose from UDP-glucose to positions 2' and 5' of partially methylated flavonols was isolated from the shoots of Chrysosplenium americanum Schwein ex Hooker. It was purified 225-fold by ammonium sulfate precipitation and successive

Enzymatic synthesis of polymethylated flavonols in Chrysosplenium americanum. III. Purification and kinetic analysis of S-adenosyl-L-methionine:3-methylquercetin 7-O-methyltransferase.

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An O-methyltransferase (OMT) which catalyzes the methylation of 3-methylquercetin to 3,7-dimethylquercetin, the second step of methyl transfers toward the biosynthesis of polymethylated flavonol glucosides, has been isolated from Chrysosplenium americanum shoot tips. The 7-OMT was purified by

Enzymatic synthesis of polymethylated flavonols in Chrysosplenium americanum. I. Partial purification and some properties of S-adenosyl-L-methionine:flavonol 3-, 6-, 7-, and 4'-O-methyltransferases.

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Four novel flavonol O-methyltransferases (OMTs) were partially purified from Chrysosplenium americanum by precipitation with ammonium sulfate, successive chromatography on Sephacryl S-200 and hydroxylapatite, and chromatofocusing on Polybuffer ion exchanger. They exhibited strict position

A flavonoid compound from Chrysosplenium nudicaule inhibits growth and induces apoptosis of the human stomach cancer cell line SGC-7901.

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BACKGROUND Gastric cancer remains highly prevalent, but treatment options are limited. Natural products have proved to be a rich source of anticancer drugs. Chrysosplenium nudicaule Ledeb. (Saxifragaceae) is a perennial herb that grows in the highlands of China. It has been used as a traditional

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