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Synthetic spatially graded Rac activation drives directed cell polarization and locomotion
Synthetic spatially graded Rac directed cell polarization and locomotion Molecular Networks
2012/5/2
Migrating cells possess intracellular gradients of Rho GTPases, but it is unknown whether these shallow gradients themselves can induce motility. Here we describe a new method to present cells with in...
摘要为研究棉花纤维起始和伸长的分子机理，在棉花纤维EST序列分析的基础上，从棉花纤维中扩增并克隆了2个棉花Rac蛋白的cDNA基因，分别命名为GhRacA和GhRacB。GhRacA cDNA长959 bp，推测的编码蛋白包含211个氨基酸。GhRacB cDNA长920 bp，编码195个氨基酸的蛋白。GhRacA和GhRacB蛋白均含有GTP/GDP结合和激活区域、Effector区和碱性氨基...
合成了后过渡金属铁(2-Me-3-ClPh)2PBIMe2FeCl2低聚催化剂，并与亚乙基桥茂金属共聚催化剂rac-C2H4(Ind)2ZrCl2共用，用MAO（1.4 mol/L甲苯溶液）作为助催化剂，原位共聚合成线性低密度聚乙烯（LLDPE）.结果发现，这种后过渡铁催化剂具有很高的低聚催化活性［1.0×107 g oligomer/(mol Fe·h)］，双功能催化体系的催化活性保持在106 ...