化学
多糖
高碘酸盐
大小排阻色谱法
木糖
半乳糖
水解
酸水解
傅里叶变换红外光谱
甘露糖
核化学
色谱法
有机化学
酶
物理
发酵
量子力学
作者
Zhaojing Wang,Yawei Zeng,Dianhui Luo
标识
DOI:10.1016/j.carbpol.2016.06.094
摘要
A crude polysaccharide was extracted from the edible fungi Tremella sanguinea Peng, and a polysaccharide TSP-II (31.56%) was separated and purified from the crude polysaccharide. TSP-II was a homogeneous polysaccharide by the high-performance size-exclusion chromatography (HPSEC), had a molecular weight of 356 kD and consisted mainly of mannose, xylose, galactose and glucose at a molar ratio 5.9:2.4:1:1.1. The structural assignment of TSP-II was carried out using fourier transform infrared spectroscopy (FTIR) analysis, periodate oxidation-smith degradation, partial hydrolysis with acid, methylation analysis and nuclear magnetic resonance (NMR) studies, and the repeating unit of TSP-II was thus determined. The result indicated that →3)-α-d-Manp-(1→, →2)-α-d-Xylp-(1→, →6)-α-d-Glcp-(1→ and →3)-α-d-Galp-(1→ formed the major components of the main-chain structure, and TSP-II was a non-branched polysaccharide. Transmission electron microscopy (TEM) analysis revealed a primary non-branched and entangled state in its microstructure. TSP-II had higher scavenging activities on hydroxyl radical (EC50 = 0.088 mg/ml) and superoxide radical (EC50 = 0.127 mg/ml) than Vitamin C (Vc).
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