High-purity steviol glycosides

Abstract

Methods of preparing highly purified steviol glycosides, particularly rebaudiosides A, D and X are described. The method includes expression of UDP-glucosyltransferases from Stevia rebaudiana Bertoni, which are capable converting certain steviol glycosides to rebaudiosides A, D and X. The highly purified rebaudiosides A, D and X, are useful as non-caloric sweetener in edible and chewable compositions such as any beverages, confectioneries, bakery products, cookies, and chewing gums.

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