文献类型：期刊文献

英文题名：Structural features of a pectic polysaccharide from mulberry leaves

作者：Xia, Wei[1];Liu, Shu-Qi[1];Zhang, Wen-Qing[1];Luo, Guo-An[2]

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[2]Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

年份：2008

卷号：10

期号：9

起止页码：857

外文期刊名：JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000260642200008)】；

语种：英文

外文关键词：mulberry leaves; polysaccharide; structure; pectin

摘要：A pectic polysaccharide SDA was obtained from the boiling water extract of mulberry leaves. It consisted of rhamnose, arabinose, xylose, glucose, galactose, and galacturonic acid units in the molar ratio of 5:4:1:2:6:38. Its molecular weight was determined to be 1.5104 by high-performance gel filtration chromatography. A combination of linkage analysis, partial acid hydrolysis, ESIMS, 1H-NMR, and 13C-NMR spectral analyses revealed its structural features. It was found that SDA possessed an -(14)-galacturonan backbone with some insertions of (12) Rha residues, with the side chains attached to the O-3 or O-2 position of GalA residues, or the O-4 position of 1,2-linked Rha residues. The side chains contained branched (15) linked arabinan, branched (13) linked rhamman, linear (14) linked xylan, linear (14) linked glucan, and linear (12) linked galactan. SDA was a new acidic polysaccharide isolated from mulberry leaves for the first time.