首页> 美国卫生研究院文献>The Journal of Biophysical and Biochemical Cytology >ALTERATION OF THE CONFORMATION OF PROTEINS IN RED BLOOD CELL MEMBRANES AND IN SOLUTION BY FIXATIVES USED IN ELECTRON MICROSCOPY
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ALTERATION OF THE CONFORMATION OF PROTEINS IN RED BLOOD CELL MEMBRANES AND IN SOLUTION BY FIXATIVES USED IN ELECTRON MICROSCOPY

机译:电子显微镜用固定液改变红色血液细胞膜中和蛋白质溶液中的构象

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摘要

The effects of several commonly employed fixatives on the three-dimensional conformations of two soluble proteins and the protein of intact red blood cell membranes have been studied by means of circular dichroism measurements in the spectral region of the peptide absorption bands. The fixatives used produced significant and parallel conformational changes in all of the proteins, in the increasing order: glutaraldehyde; OsO4; glutaraldehyde followed by OsO4; and KMnO4. The last two treatments obliterated most of the helical character of the proteins. The significance of these observations to the preparation of specimens for electron microscopy is discussed.
机译:几种常用的固定剂对两种可溶性蛋白质和完整的红细胞膜蛋白质的三维构象的影响已经通过在肽吸收带光谱区域内的圆二色性测量进行了研究。所用的固定剂以递增的顺序在所有蛋白质中产生了明显且平行的构象变化:戊二醛; OsO4;戊二醛,然后是OsO4;和KMnO4。后两种处理消除了蛋白质的大部分螺旋特性。讨论了这些观察对电子显微镜标本制备的意义。

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