title: Structure identification of a polysaccharide purified from litchi (Litchi chinensis Sonn.) pulp.
abstract: As a health-beneficial fruit, litchi is widely accepted by people in subtropical and tropical regions. However, the critical chemicals responsible for the health benefits are not clear yet. As a large amount of polysaccharides are present in litchi, they might play an important role in the health benefits. In this work, the main water-soluble polysaccharide (LPPBa) was purified from litchi pulp. The chemical structure was characterized as arabinogalactan by gas chromatography and nuclear magnetic resonance spectrometry (NMR). NMR data revealed the glycosidic linkages and their locations in backbone and branches. The precise structure was putatively identified as below, and it was different to those commonly occurred arabinogalactans. The molecular weight was determined to be 2.4 × 10(6)Da by gel permeation chromatography.
authors.affiliation: Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
authors.forename: Bao
authors.initials: B
authors.lastname: Yang
authors.affiliation: School of Engineering, Monash University, Bandar Sunway 46150, Selangor, Malaysia.
authors.forename: K Nagendra
authors.initials: KN
authors.lastname: Prasad
authors.affiliation: Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China. Electronic address: ymjiang@scbg.ac.cn.
authors.forename: Yueming
authors.initials: Y
authors.lastname: Jiang
mesh_terms: D002240:Carbohydrate Sequence; D032125:Litchi / Q000737:chemistry*; D008969:Molecular Sequence Data; D009005:Monosaccharides / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry*
chemical_list: D009005:Monosaccharides; D010936:Plant Extracts; D011134:Polysaccharides
keywords: Arabinogalactan; Litchi; Polysaccharide; Structure