Falshaw R, Furneaux R H
Industrial Research Limited, Lower Hutt, New Zealand.
Carbohydr Res. 1994 Jan 15;252:171-82. doi: 10.1016/0008-6215(94)90014-0.
The structure of the polysaccharide isolated from tetrasporophytic plants of the New Zealand red alga Gigartina decipiens has been determined by chemical and spectroscopic techniques. It is a linear polymer composed primarily of alternating 3-linked beta-D-galactopyranosyl 2-sulphate and 4-linked alpha-D-galactopyranosyl 2,6-disulphate residues. About 15% of the 3-linked residues have an additional sulphate ester group at the 6-position. Aside from this small extra sulphate substitution, the structure is that of the idealised lambda-carrageenan. Good quality solution-state 13C NMR spectra were recorded and interpreted for this carrageenan and for the carrageenans produced from it by solvolytic desulphation and alkali modification.
通过化学和光谱技术确定了从新西兰红藻Gigartina decipiens的四分孢子体植物中分离出的多糖的结构。它是一种线性聚合物，主要由交替的3-连接的β-D-吡喃半乳糖基2-硫酸盐和4-连接的α-D-吡喃半乳糖基2,6-二硫酸盐残基组成。约15%的3-连接残基在6位有一个额外的硫酸酯基团。除了这种少量的额外硫酸取代外，其结构为理想化的λ-卡拉胶结构。记录并解释了这种卡拉胶以及通过溶剂解脱硫和碱改性从其制得的卡拉胶的高质量溶液态13C NMR光谱。
