Polysaccharides of diatoms occurring in Lake Baikal

Autor:	N. M. Shevchenko, E. V. Likhoshvai, L. P. Ponomorenko, Tatyana N. Zvyagintseva, Vladimir V. Isakov, Mikhail I. Kusaykin, S. A. Alekseeva
Rok vydání:	2005
Předmět:	chemistry.chemical_classification Chromatography Aulacoseira baicalensis Carbohydrate moiety Biology Polysaccharide Applied Microbiology and Biotechnology Biochemistry chemistry medicine Composition (visual arts) Mannitol medicine.drug
Zdroj:	Applied Biochemistry and Microbiology. 41:185-191
ISSN:	1608-3024 0003-6838
DOI:	10.1007/s10438-005-0033-5
Popis:	Polysaccharide composition of neutral, acid- and alkali-soluble fractions of the diatoms Stephanodiscus meyerii Genkal et Popovsk and Aulacoseira baicalensis (K. Meyer) Simonsen of Lake Baikal has been studied. Neutral polysaccharides were represented by chrysolaminarans (1→3;1→6-β-D-glucans). The chrysolaminaran from S. meyerii consists of the high- and low-molecular-weight fractions (40 and 2–5 kDa, respectively) and contains a large number of β-1→6-bound glucose residues. The chrysolaminaran from A. baicalensis is a low-molecular-weight 1→3;1→6-β-D-glucan containing a small number of β-1→6-bonds, with mannitol being attached to the reducing unit of its chain. Acid- and alkali-soluble polysaccharide fractions are practically absent in S. meyerii. The alkali-soluble fraction from A. baicalensis is a low-molecular-weight (2-kDa) glycoprotein, the carbohydrate moiety of which is represented by a heteropolysaccharide.
Databáze:	OpenAIRE
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