Rutin and quercitrin are hydrolysed to quercetin, and robinin is hydrolysed to kaempferol, by faecal flora from healthy subjects. The enzymes required for these hydrolyses, namely alpha-rhamnosidase and beta-galactosidase, were produced by some strains of Bacteroides distasonis; other strains, however, synthesized beta-glucosidase. The last-named enzyme was also elaborated by Bacteroides uniformis and Bacteroides ovatus. All the enzymes were produced constitutively. A cell-free extract of B. distasonis containing beta-glucosidase displayed an enzymic activity of 1 mumol/10 min per 10 mg of protein.
Research Article| December 15 1987
Hydrolysis of dietary flavonoid glycosides by strains of intestinal Bacteroides from humans
V D Bokkenheuser;
C H Shackleton;
Biochem J (1987) 248 (3): 953–956.
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V D Bokkenheuser, C H Shackleton, J Winter; Hydrolysis of dietary flavonoid glycosides by strains of intestinal Bacteroides from humans. Biochem J 15 December 1987; 248 (3): 953–956. doi: https://doi.org/10.1042/bj2480953
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