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Título

Nucleolar fibrillar centers in mouse spermatid nucleoli

Autor Krimer, Dora B. ; Esponda, Pedro
Palabras clave Nucleolus
Spermatid
Fibrillar center
Electron microscopy
Serial sections
Fecha de publicación 1979
EditorRockefeller University Press
Citación European Journal of Cell Biology 20 , 156-158 (1979)
ResumenThe nucleoli of young spermatids of mice are described.They exhibit a very special shape resembling a ..padlock" in which three different areas can be distinguished:(a) a compact zone corresponding to the fibrillar component, (b) the garnullar component and (c) a fibrillar center of low density. Fibrillar and granular components usually appear segregated. This nucleolus has been reconstructed based on serial sectioning. When the silver impregnation technique is employed, both fibrillar an granular components show a positive reaction, although the fibrillar center is free of granules. The morphology of the fibrillar center seems to be similar to that reported in other cells. The possibility that these fibrillar centers correspond to the nucleolar organizer is discussed.
Descripción 3 p.-6 fig.
URI http://hdl.handle.net/10261/109815
ISSN0021-9525
E-ISSN1540-8140
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