Volume 5 Issue 2, December 1995: 273-278
LETTERS TO THE EDITOR
The detection of nuclear matrix in most primitive present-existing eukaryote, Giardia lamblia.
DIAI JIALING, JINGYAN LI, SIQI LU
Laboratory of Evolutionary Cell Biology, Kunming Institute of Zoology, Academia Sinica, Kunming, Yunnan 650223, China.
Correspondence: JINGYAN LI
The nuclear matrix of diplomonad Giardia lamblia was detected for the first time with DGD embedment-sectioning-embedment free electron microscopy after a series of specific extractions. The result showed that archaezoa Giardia lamblia already possessed nuclear matrix within its two nuclei. The finest fibtrils of the nuclear matrix of Giardia lamblia were measured to be about 11 to 13 nm in thickness. However, the nuclear lamina and nucleolus have never been observed. These results seem to suggest that nuclear matrix I s an indispensable intranuclear structural component even in the primitive nucleolus.
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