Abstract
2-O-(beta-D-Glucopyranosyl)ascorbic acid (AA 2 beta G) isolated from a popular traditional Chinese food (Lycium fruit) was synthesized using cellulase derived from Trichoderma sp. with cellobiose as a glucose donor. 6-O-(beta-D-Glucopyranosyl)ascorbic acid as well as AA 2 beta G was also synthesized in this reaction. The vitamin C activity of AA 2 beta G was also evaluated using inherently scorbutic (osteogenic disorder Shionogi [ODS]) rats. The rats were fed vitamin C-deficient food and water containing AA 2 beta G for 21. AA 2 beta G supported their growth and the level of vitamin C in tissues was moderately maintained. The vitamin C level in some tissues depended on the hydrolytic activity of AA 2 beta G (beta-glucosidase activity) although the correlation was not statistically significant (P=0.08). The results indicate that AA 2 beta G has pro-vitamin C activity.
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