title: Isolation of Biopterin-alpha-glucoside from Spirulina (Arthrospira) platensis and Its Physiologic Function.
abstract: : A fluorescent substance was isolated from the cyanobacterium with a yield of 4.5 mg per 10 g of dried Spirulina (Arthrospira) platensis cells by gentle extraction and ethanol fractionation followed by column chromatography. The fluorescent substance, which has absorption maxima at 256 nm and 362 nm (pH 8.4), was identified as biopterin-alpha-glucoside by spectrophotometry and nuclear magnetic resonance spectroscopy. Biopterin-alpha-glucoside prevented decolorization of the photosynthetic pigments, chlorophyll a, phycocyanin, and carotenoids in photosynthetic vesicles of Spirulina platensis cells, by ultraviolet irradiation.
authors.affiliation: Toin Human Science and Technology Center, Department of Materials Science and Technology, Toin University of Yokohama, 1614 Kurogane-cho, Aoba-ku, Yokohama 225-8502, Japan
authors.initials: Y
authors.lastname: Noguchi
authors.initials: A
authors.lastname: Ishii
authors.initials: A
authors.lastname: Matsushima
authors.initials: D
authors.lastname: Haishi
authors.initials: K
authors.lastname: Yasumuro
authors.initials: T
authors.lastname: Moriguchi
authors.initials: T
authors.lastname: Wada
authors.initials: Y
authors.lastname: Kodera
authors.initials: M
authors.lastname: Hiroto
authors.initials: H
authors.lastname: Nishimura
authors.initials: M
authors.lastname: Sekine
authors.initials: Y
authors.lastname: Inada