title: Structural elucidation and antioxidant activity of a water-soluble polysaccharide from the fruit bodies of Bulgaria inquinans (Fries).
abstract: The non-lichenized ascomycete Bulgaria inquinans (Fries), growing in the Changbai Mountain of China, has been used as medicinal diet for many years. In a previous study, we have reported that a heteropolysaccharide BIWS-4b from the fruit bodies of B. inquinans (Fries) exhibited markedly antimalarial and immunostimulating activities. In this paper, the structural features and antioxidant activity of BIWS-4b were investigated. The results showed that BIWS-4b contains an α-(1→2), (1→6)-mannan core to which the glucogalactan chains are attached. The glucogalactan chains were composed of (1→6)-, (1→5)- and (1→5,6)-linked β-Galf, (1→4)-linked and non-reducing terminal β-Glcp units, and might be attached to the mannan core at the O-2 positions of α-Manp units. The antioxidant assays showed that BIWS-4b exhibited good activities, including free radicals scavenging effects, ferrous ion-chelating ability and reducing power. Thus, BIWS-4b could be used as a natural antioxidant agent for food and pharmaceutical industries.
authors: School of Life Sciences, Northeast Normal University, Changchun 130024, PR China.
authors: Hongtao
authors: H
authors: Bi
authors: Tingting
authors: T
authors: Gao
authors: Zonghong
authors: Z
authors: Li
authors: Li
authors: L
authors: Ji
authors: Wei
authors: W
authors: Yang
authors: B
authors: B
authors: Jeff Iteku
authors: Enxu
authors: E
authors: Liu
authors: Yifa
authors: Y
authors: Zhou
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification; D001203:Ascomycota / Q000737:chemistry*; D002240:Carbohydrate Sequence; D002681:China; D048690:Fruiting Bodies, Fungal / Q000737:chemistry*; D008969:Molecular Sequence Data; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D000975:Antioxidants; D011134:Polysaccharides