【正文】
The ThreeDimensional Structures of Proteins 蛋白質(zhì)的三維結(jié)構(gòu) 分離氨基酸常用的是帶有耐酸性非常強(qiáng)的磺酸根 SO3- Na+(以鹽的形式出現(xiàn))的強(qiáng)陽離子交換樹脂。首先將這種樹脂填充到柱子中,然后注入含有樣品的流動(dòng)相,樣品中含有陽離子成分X+ ,通過靜電吸引,與樹脂中的帶電基團(tuán)相互作用,結(jié)果 X+ 與Na+ 交換,即發(fā)生陽離子交換后,形成 SO3- X+ 。 ? Ionexchange Chromatography 離子交換 A protein Crystal Is not a rock or salt. Some protein crystals The use of rebinant proteins 重組蛋白 部分課件來自中國科技大學(xué)生命科學(xué)學(xué)院牛立文教授 “Perhaps the most remarkable features of the molecule are its plexity and its lack of symmetry. The arrangement seems to be almost totally lacking in kind of regularities which on instinctively anticipates, and it is more plicated than has been predicted by any theory of protein structure.” John Kendrew 結(jié)構(gòu)生物學(xué)研究的主要技術(shù)手段 : ?顯微方法(衍射或散射): ?X射線晶體學(xué)( Xray crystallography) 優(yōu)點(diǎn):方法很成熟,可高通量化,分辨率高,可快速測(cè)定結(jié)構(gòu); 缺點(diǎn):需要可衍