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This paper reports, for the first time, that Archaerhodopsin-4 (AR4) could be reconstituted into phospholipid liposomes by self-assembly. AR4 is a new membrane protein isolated from halobacteria H.sp. xz515 in a salt lake of Tibet, China. This is a bacteriorhodopsin (bR) like protein, function as a light-driven proton pump. Experimental measurements verified that similar to bR, AR not only remains its biological activity in pmteoliposome, but also keeps a preferred orientation in self-assembly. 相似文献
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设(L,≤,∨,∧)为一分配格。满足Ax=x的向量x称为方阵A的特征向量。本文的主工目的是通过矩阵的伴随有向图来刻画矩阵的特征向量并给出矩阵特征向量的界。同时我们将定义矩阵A的上基本特征向量并讨论它的性质。 相似文献
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引进了相对于交闭系统的分式R0代数的概念,井研究了R0代数上的Gabriel滤子,证明该滤子可以确定R0代数上的一种同余关系,为进一步研究局部化R0代数奠定了基础. 相似文献
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In this article, the authors mainly study how to obtain new semicontinuous lattices from the given semicontinuous lattices and discuss the conditions under which the image of a semicontinuous projection operator is also semicontinuous. Moreover, the authors investigate the relation between semicontinuous lattices and completely distributive lattices. Finally, it is proved that the strongly semicontinuous lattice category is a Cartesian closed category. 相似文献
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细菌视紫红质/聚乙烯醇复合膜的制备及相关功能研究 总被引:2,自引:0,他引:2
细菌视紫红质(bR)是一种独特的光敏蛋白,具有光致变色和光驱质子泵功能 。将bR蛋白包埋于聚乙烯醇(PVA)基质中,制备了bR/PVA复合膜。利用紫外-可 见分光光度计和自制的毫秒级动力学光谱仪,检测了样品的吸收光谱和光循环M中 间体在脉冲光激发下随时间的变化;同时,利用凝胶扫描成像仪及相关分析软件考 察了样品成膜后的均匀程度。实验表明:bR/PVA复合膜具有良好的均匀性、透明性 和力学性能,而且bR蛋白保持了原有的生物活性和光学性质,bR与M中间体之间能 达到一种光可控制的双稳态,M中间体的寿命也得到了显著的延长,证实了bR可以 提供一个用于信息存储的模型材料。 相似文献
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