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Título: | Centromere ultrastructure in germ-line chromosomes of Parascaris |
Autor: | Goday, Clara CSIC ; Ciofi-Luzzatto, A.; Pimpinelli, Sergio | Palabras clave: | Developmental Biology Layered Structure Outer Layer Longitudinal Section Middle Layer |
Fecha de publicación: | feb-1985 | Editor: | Springer Nature | Citación: | Chromosoma 91: 121-125 (1985) | Resumen: | Ultrastructural analysis of the centromere in germ-line mitotic chromosomes of Parascaris univalens and Parascaris equorum revealed that these chromosomes are holocentric. In thin longitudinal sections of both species the kinetochore appeared as a continuous plate (up to 3.8 μm long) and displayed a layered structure. This structure consisted of electron-dense inner and outer layers (average width 10 nm) separated by a less dense middle layer (25 nm wide), which had transverse electron-dense bars (10 nm wide) regularly spaced every 25–30 nm. Thus the ladderlike kinetochore profile observed in Parascaris gonial mitotic chromosomes represents a different type of organization from that of the classical trilaminar kinetochore found in both holocentric and monocentric chromosomes. | Versión del editor: | http://dx.doi.org/10.1007/BF00294055 | URI: | http://hdl.handle.net/10261/252993 | DOI: | 10.1007/BF00294055 | Identificadores: | doi: 10.1007/BF00294055 issn: 0009-5915 e-issn: 1432-0886 |
Aparece en las colecciones: | (CIB) Artículos |
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