Stage - dependent centromere structure in mitosis and meiosis
[EN] Through the use of a silver staining technique three distinct regions can always be visualized in chromosomes:nucleolus organizer regions, centromere and telomere regions. The organization of the centromere region was studied in different phases of mitosis and meiosis. The centromere region was...
| Autores: | , , |
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| Formato: | artículo |
| Fecha de publicación: | 1988 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/13285 |
| Acesso em linha: | http://hdl.handle.net/10261/13285 |
| Access Level: | acceso abierto |
| Palavra-chave: | Centromeres Meiosis (reductional division) Silver staining |
| Resumo: | [EN] Through the use of a silver staining technique three distinct regions can always be visualized in chromosomes:nucleolus organizer regions, centromere and telomere regions. The organization of the centromere region was studied in different phases of mitosis and meiosis. The centromere region was shown to be formed by an assembled dot-like structure with a market different complexity between mitotic and metaphase I chromosomes, being quadripartite in the former and bipartite in the latter. The nature of this difference is suggested to be related to the mechanism responsible to reductional division. The protein nature of these dots and their correspondence to the chromosome "core" and to the "scaffolding" is discussed. The presence of terminal dots in almost all telomeres and the existence of intercalar dots in some chromosomes are interpreted as being dependent on the individual phylogeny for each chromosome. |
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