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Methods The cell-free system was prepared by ultracentrifugation of Xenopus eggs and activated by cytochrome C.

方法超速离心制备非洲无细胞体系,细胞色素C激亡体系。

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We separated the subfractions of LDL by precipitating method and density gradient ultracentrifugation, and identified the subfraction by electronphoresis and electron microscope.

通过沉淀法分离LDL,然后经过超速离心法分离其亚组分。

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