Fully active alternansucrases partially deleted in its carboxy-terminal and amino-terminal domains and mutants thereof
申请人:Monsan Pierre
公开号:US20060127328A1
公开(公告)日:2006-06-15
Nucleic acid sequences of truncated or mutated alternansucrases, vectors containing these nucleic acids sequences, host cells transformed with the nucleic acid sequences encoding truncated or mutated alternansucrases are provided. Furthermore, a process to recombinantly alternansucrase with a high level of expression, while retaining the enzymatic activity is described.
THE ACTION OF HYDROXYLAMINE ON METHYL ALPHA- AND BETA-<scp>D</scp>-GLUCOPYRANOSIDE TETRANITRATE IN PYRIDINE
作者:L. D. Hayward、C. B. Purves
DOI:10.1139/v54-004
日期:1954.1.1
the most part at least without Walden inversions or other change, because hydrogenation of the sirupy product reduced it in more than 80% yield to crystalline methyl glucoside. The product from methyl-β-glucoside tetranitrate consisted of the 2,3,6-trinitrate (28%), the 3,6-dinitrate (17%), and an unidentified trinitrate (8%) which might have been a mixture.The structures of the first two compounds
THE CHARACTERIZATION OF TRI-<i>O</i>-TOSYL SUCROSE
作者:P. D. Bragg、J. K. N. Jones
DOI:10.1139/v59-078
日期:1959.3.1
Tri-O-tosyl sucrose was synthesized by the action of p-tolylsulphonyl chloride upon sucrose in pyridine, and the tosyl groups were shown by methylation to be mainly (84%) located on the three primary hydroxyl groups.
Polyasaccharide polyol, process for preparation thereof and anti-tumor agent
申请人:TOYO SODA MANUFACTURING CO., LTD.
公开号:EP0121146A2
公开(公告)日:1984-10-10
Described is a polysaccharide polyol derived from Volvariella volvacea, which is comprised of the following three types of recurring units.
wherein D-Glu is D-glucopyranosyl residue, each number represents the linkage position, X is HOCH2CH(CH20H)-O-CH(CH20H)-O-[Formula A) or D-glucopyranosyl and Y is -CH2-CH(CH20H)-O-CH(CH20H)-O- or D-glucopyranosyl, at least a part of X in the recurring units II and III is that of formula A, and, the average number of III is about 4-12 and the average number of the sum of II and III is about 16-23, per 100 of the sum of I, II and III. The polysaccharide is prepared by extracting Volvariella volvacea with an aqueous alkali solution and oxidising and then reducing the soluble fraction to cut parts of C-C bonds of side chains. The polysaccharide is useful as an anti-tumour agent.
所述的多糖多元醇提取自伏瓦氏菌,由以下三种重复单元组成。
其中 D-Glu 是 D-吡喃葡萄糖基残基,每个数字代表连接位置,X 是 HOCH2CH(CH20H)-O-CH(CH20H)-O-[式 A]或 D-吡喃葡萄糖基,Y 是 -CH2-CH(CH20H)-O-CH(CH20H)-O- 或 D-吡喃葡萄糖基、重复单元 II 和 III 中的 X 至少有一部分是式 A 所示的,并且,每 100 个 I、II 和 III 的总和中,III 的平均数量约为 4-12 个,II 和 III 的总和的平均数量约为 16-23 个。多糖的制备方法是用碱水溶液提取伏瓦瑞菌,氧化后还原可溶部分,切断侧链的部分 C-C 键。这种多糖可用作抗肿瘤剂。
A novel beta-D-glucan derived from a microorganism of the genus Aureobasidium. The beta-D-glucan exhibits physiological activities such as acceleration of the excretion of heavy metals, anticholesteremic-activity, and an antioncotic-activity via the cellular immune system.