GUM GHATTI (INDIAN GUM) .3. NEUTRAL OLIGOSACCHARIDES FORMED ON PARTIAL ACID HYDROLYSIS OF THE GUM
GUM GHATTI (INDIAN GUM) .3. NEUTRAL OLIGOSACCHARIDES FORMED ON PARTIAL ACID HYDROLYSIS OF THE GUM
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DOI：
10.1039/jr9580004408
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发表时间：
1958-01-01
期刊：
影响因子：
--
通讯作者：
HIRST, EL
中科院分区：
文献类型：
--
作者：
ASPINALL, GO;AURET, BJ;HIRST, EL
胶的部分酸水解提供了两个同源系列的寡糖以及少量的3-OP-~-吡喃半乳糖基-~-半乳糖和其他二糖。系列的前三个成员 0--D-吡喃半乳糖基-[(1----P 6)-0-$-D-吡喃半乳糖1],-(1+ 6)-D-半乳糖 (12= 0、1 和 2) 和系列的前四个成员 O-@-D-吡喃半乳糖基-[(1 __t 6)-0-P-~-吡喃半乳糖基],-(1 __t 3)-~-阿拉伯糖 (n= 0、1、2 和 3) 已被表征。讨论了这些结果的意义。以往对加蒂尔胶的结构研究结果可以概括为部分结构(I)、(11)和(111)。该树胶含有 1:6-连接的 PD-半乳糖醛酸残基 (I) 链，其直接或通过一个或多个 I:6-连接的半乳糖残基与醛二糖醛酸单元（I1 和 111）连接。大多数取代基R是单个非还原性L-阿拉伯呋喃糖端基。我们现在报告对口香糖部分酸水解形成的中性寡糖的检查。
Partial acid hydrolysis of the gum affords two homologous series of oligosaccharides together with small amounts of 3-OP-~-galactopyranosyl-~-galactose and other disaccharides. The first three members of the series 0--D-galactopyranosyl-[(1----P 6)-0-$-D-galactopyranosy1],-(1+ 6)-D-galactose (12= 0, 1, and 2) and the first four members of the series O-@-D-galactopyranosyl-[(1 __t 6)-0-P-~-galactopyranosyl],-(1 __t 3)-~-arabinose (n= 0, 1, 2, and 3) have been characterised. The significance of these results is discussed.THE results of previous structural studies on gum ghattil can be summarised in the partial structures (I),(11), and (111). The gum contains chains of 1: 6-linked PD-galaCtO-pyranose residues (I) to which are attached either directly or through one or more I: 6-linked galactose residues the aldobiouronic acid units (I1 and 111). The majority of the substituents R are single non-reducing L-arabofuranose end-groups. We now report an examination of the neutral oligosaccharides formed on partial acid hydrolysis of the gum.