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Structures of flavonoid 7-O-α-glucoside products generated in transglycosylation reactions using α-d-glucopyranosyl fluoride as a sugar donor and the O-α-glycoligase MalA-D416A derived from an α-glucosidase of the thermophilic archeon Sulfolobus solfataricus. The left structure represents flavonol, flavanone, flavanonol, and isoflavone glucoside products obtained in these transglycosylations; the right structure represents MalA-D416A-mediated flavanol glucoside products.
