Abstract
This work deals with the types of nuclear skeletal structures obtained from human fibroblast nuclei isolated by different procedures. It is confirmed that, in somatic vertebrate cells, the pore complex-lamina is always observed, whereas the presence of internal nucleolar and extranucleolar residual structures depends upon the method of nuclear isolation used. Furthermore, the results reported here argue for the existence of a nucleolar skeleton different from the nucleolar matrix often observed in different cell types by other investigators. The conditions of nuclear isolation which allow us to visualize this nucleolar skeleton without any other internal residual structures are described. The attachment of the nucleolar skeleton to the lamina suggested by the present data is considered in relation to the in situ position of nucleoli near the nuclear envelope.
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Bourgeois, C.A., Bouvier, D., Seve, A.P. et al. Evidence for the existence of a nucleolar skeleton attached to the pore complex-lamina in human fibroblasts. Chromosoma 95, 315–323 (1987). https://doi.org/10.1007/BF00293178
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DOI: https://doi.org/10.1007/BF00293178