期刊
CARBOHYDRATE RESEARCH
卷 343, 期 4, 页码 810-816出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2007.12.013
关键词
lipopolysaccharide; bacterial polysaccharide structure; Azospirillum brasilense; 2-O-methyl-L-rhamnose
A mixture of two structurally distinct neutral O-polysaccharides was obtained by mild acid degradation of the lipopolysaccharide isolated by the phenol/water extraction from the asymbiotic diazotrophic rhizobacterium Azospirillum brasilense SIT The following structures of the O-polysaccharides were established by composition and methylation analyses, Smith degradation, and H-1 and C-13 NMR spectroscopy, including a 2D NOESY experiment: [GRAPHICS] where L-Rha2Me stands for 2-O-methyl-L-rhamnose and SHb for the (S)-3-hydroxybutanoyl group. The occurrence of two distinct polysaccharides is reported for the first time in Azospirillum spp. (c) 2007 Elsevier Ltd. All rights reserved.
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