Glucosylation of raffinose via alternansucrase acceptor reactions
作者:Gregory L. Côté、Christopher A. Dunlap、Karl E. Vermillion
DOI:10.1016/j.carres.2009.06.023
日期:2009.10
The glucansucrase known as alternansucrase [EC 2.4.1.140] can transfer glucosyl units from sucrose to raffinose to give good yields of oligosaccharides, which may serve as prebiotics. The main products were the tetrasaccharides alpha-D-Glcp-(1 -> 3)-alpha-D-Galp-(1 -> 6)-alpha-D-Glcp-(1 <-> 2)-beta-D-Fruf and alpha-D-Glcp-(1 -> 4)-alpha-D-Galp-(1 -> 6)-alpha-D-Glcp-(1 <-> 2)-beta-D-Fruf in ratios ranging from 4:1 to 9:1, along with lesser amounts of alpha-D-Glcp-(1 -> 6)-alpha-D-Galp-(1 -> 6)-alpha-D-Glcp-(1 <-> 2)-beta-D-Fruf. Ten unusual pentasaccharide structures were isolated. Three of these arose from glucosylation of the major tetrasaccharide product, two each from the minor tetrasaccharides, and three were the result of glucosylations of the fructose acceptor product leucrose or isomaltulose. The major pentasaccharide product arose from glucosylation of the major tetrasaccharide at position 4 of the fructofuranosyl unit, to give a subunit structure analogous to that of maltulose. A number of hexasaccharides and higher oligosaccharides were also produced. Unlike alternansucrase, dextransucrase [EC 2.4.1.5] gave only a single tetrasaccharide product in low yield, and no significant amounts of higher oligosaccharides. The tetrasaccharide structure from dextransucrase was found to be alpha-D-Glcp-(1 -> 4)-alpha-D-Galp-(1 -> 6)-alpha-D-Glcp-(1 <-> 2)-beta-D-Fruf, which is at odds with the previously published structure. Published by Elsevier Ltd.
US4812444A
申请人:——
公开号:US4812444A
公开(公告)日:1989-03-14
[EN] COLD STORAGE SOLUTION AND STORAGE METHOD FOR STEM CELLS<br/>[FR] SOLUTION DE STOCKAGE À FROID ET PROCÉDÉ DE STOCKAGE POUR CELLULES SOUCHES<br/>[JA] 幹細胞用冷蔵保存液及び保存方法
[EN] GEL FORMULATIONS FOR ENHANCING THE EFFECT OF RADIOTHERAPY<br/>[FR] FORMULATIONS DE GEL POUR AMÉLIORER L'EFFET DE RADIOTHÉRAPIE
申请人:UNIV DENMARK TECH DTU
公开号:WO2016079331A1
公开(公告)日:2016-05-26
The present invention relates to a composition comprising: a. non-water soluble carbohydrates b. a contrast agent for imaging, wherein at least 60% of the contrast agent remains within 10 cm from the injection site after 24h, for use in local co-administration into a human or animal body, and wherein the composition is a liquid before administration into the human or animal body and increases in viscosity by more than 1,000 centipoise (cP) after administration.
本发明涉及一种包含以下成分的组成物:a. 非水溶性碳水化合物 b. 成像的对比剂,其中至少60%的对比剂在24小时后保持在注射部位10厘米范围内,用于在人体或动物体内局部共同给药,并且该组成物在给药前为液态,在给药后在粘度上增加超过1,000厘泊(cP)。