Dimer FVII polypeptides, which binds and inhibits two TF molecules simultaneously.
Dimer FVII多肽同时结合并抑制两个TF分子。
DIMERIC TF ANTAGONIST
申请人:NOVO NORDISK A/S
公开号:EP1485476A2
公开(公告)日:2004-12-15
[EN] DIMERIC TF ANTAGONIST<br/>[FR] DIMERES ANTAGONISTES DU TF
申请人:NOVO NORDISK AS
公开号:WO2003076461A2
公开(公告)日:2003-09-18
Dimer FVII polypeptides, which binds and inhibits two TF molecules simultaneously, and thereby functions as an anticoagulant.
Modulating Artificial Membrane Morphology: pH-Induced Chromatic Transition and Nanostructural Transformation of a Bolaamphiphilic Conjugated Polymer from Blue Helical Ribbons to Red Nanofibers
作者:Jie Song、Quan Cheng、Susanne Kopta、Raymond C. Stevens
DOI:10.1021/ja0035046
日期:2001.4.1
morphology. Increasing solution pH caused the fraying of helical ribbons into nanofibers accompanied by a sharp blue-to-red chromatictransition. A dramatic change in circular dichroism spectra was observed during this process, suggesting the loss of chirality in packing. A model is proposed to account for the pH-induced morphological change and chromatictransition. The color-coded transition between two distinct
Structural effect of polymerisation and dehydration on bolaamphiphilic polydiacetylene assemblies
作者:Simon J. Kew、Elizabeth A. H. Hall
DOI:10.1039/b600931j
日期:——
Polydiacetylenes (PDAs) undergo chromic responses to a range of environmental stimuli including temperature, pH and mechanical stress. A novel bolaamphiphilic diacetylene lipid has been synthesized and suspended in aqueous solution as polymerisable micrometer scale assemblies. Fourier transform infrared (FTIR) spectroscopy and transmission electron microscopy (TEM) was used to characterize the structural changes that occurred alongside the blue–red chromic response to dehydration that was observed in these materials after extended UV photo-polymerisation. This revealed a clear correlation between optical properties and molecular structure. Using TEM, the dehydrated polymer samples were found to be anisotropic ribbon-like structures, which were fractured after extended UV exposure, implicating mechanical stress in the chromic transition. FTIR spectra revealed that the chromic transition was also accompanied by significant changes to the molecular structure of the assemblies. These included a disorder–order conformational transition of the pendent alkyl chains and a change to the hydrogen-bonding environment of the amide headgroup. These data provide further insight into the correlation between structure and optical properties of lipid PDA assemblies.
聚二乙炔(PDA)会对温度、pH 值和机械应力等一系列环境刺激产生色变反应。我们合成了一种新型双亲二乙炔脂质,并将其悬浮在水溶液中,形成可聚合的微米级组件。傅立叶变换红外(FTIR)光谱和透射电子显微镜(TEM)被用来描述这些材料在长时间紫外光聚合后发生的结构变化以及对脱水的蓝-红染色反应。结果表明,光学特性与分子结构之间存在明显的相关性。利用 TEM 技术发现,脱水聚合物样品为各向异性的带状结构,在长时间紫外线照射后发生断裂,这表明色度转变过程中存在机械应力。傅立叶变换红外光谱显示,色度转变还伴随着组装体分子结构的显著变化。这些变化包括悬垂烷基链的无序构象转变和酰胺头基氢键环境的改变。这些数据进一步揭示了脂质 PDA 组合物的结构与光学特性之间的相关性。