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Characterization of Giardia cell nucleus: Its implication on the nature and origin of the primitive cell nucleus

机译：贾第虫细胞核的表征：对原始细胞核的性质和起源的暗示

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The central problem of the origin and early evolution of the eukaryotic cell is the origin of the cell nucleus, because the cell nucleus, with its double-layered nuclear envelope, is the most prominent and important morphological mark distinguishing eukaryotic cells from prokaryotes. Eukaryotic cells may have no chloroplast, mitochondria or flagellum, but they must possess a cell nucleus. The cell nucleus itself is a very complicated structure. If we try to make clear the origin and early evolution of the cell nucleus, we ought to investigate the origin and evolution of each morphological component of a cell nucleus. My monograph on 'The genesis of eukaryotic cells in the evolutionary history of life' (1979, Science Press, Beijing, in Chinese), mainly attempted to make some effort in this regard. However, to date, the hypothetical model of a fully depicted nucleus of a primitive cell has not been constructed. It seems likely that our recent studies of the nucleus of Giardia (diplonmonad) have provided a realistic basis to construct such a model.
机译：真核细胞起源和早期进化的中心问题是细胞核的起源，因为具有双层核膜的细胞核是区分真核细胞和原核生物的最突出和重要的形态标志。真核细胞可能没有叶绿体，线粒体或鞭毛，但它们必须具有细胞核。细胞核本身是非常复杂的结构。如果我们试图弄清楚细胞核的起源和早期进化，我们应该研究细胞核每个形态成分的起源和进化。我的专着《生命进化史上的真核细胞的起源》（1979年，科学出版社，北京），主要是试图在这方面做出一些努力。然而，迄今为止，尚未构建完整描绘的原始细胞核的假设模型。我们最近对贾第虫（diplonmonad）核的研究似乎为构建这种模型提供了现实基础。

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