title: Occurrence in Soybeans of a Novel Vitamin B6 Conjugate that Liberates Pyridoxine by β-Glucosidase Action after Alkali Treatment.
abstract: A type of vitamin B6 conjugates (B6X), which liberates free vitamin B6 by alkaline and successive β-glucosidase hydrolyses, is known to occur in rice bran and wheat bran. Conflicting experimental results, however, have been reported about the occurrence of B6X in soybeans. This study afforded evidence for B6X occuring in soybeans: certainly a highly purified B6X preparation from whole soybeans liberated pyridoxine when it was treated with alkali followed by β-glucosidase hydrolysis, and 5'-O-(β-D-glucopyranosyl)pyridoxine by alkali treatment alone. The B6X content varied with cultivars, of which a certain kind contained no B6X.
authors.affiliation: a Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University.
authors.forename: K
authors.initials: K
authors.lastname: Tadera
authors.affiliation: a Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University.
authors.forename: K
authors.initials: K
authors.lastname: Oda
authors.affiliation: a Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University.
authors.forename: C
authors.initials: C
authors.lastname: Nakahara
keywords: B6X; derivative of pyridoxine glucoside; pyridoxine conjugate; soybean; vitamin B6 conjugate