The cytology of Aspergillus nidulans

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Aspergillus nidulans

Light-dependent conidiation in the filamentous ascomycete, Aspergillus nidulans, is contingent on the allelic state of the velvet (veA) gene. Light dependence is abolished by a mutation in this gene (veAl) , which allows conidiation to occur in the absence of light. We have isolated and characterized six extragenic suppressors of veAl that restore the light-dependent conidiation phenotype. Alle...

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Mitosis in Aspergillus nidulans.

Mitosis in growing hyphae of haploid and diploid Aspergillus nidulans has been studied with the light microscope in Helly-fixed preparations. At the periphery of the nucleus a sharply defined granule is invariably found which has strong affinity for acid fuchsin. Mitosis begins with the duplication of this granule and the development inside the nucleus of a gradually lengthening fibre between t...

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Electrophoretic karyotype of Aspergillus nidulans.

An electrophoretic karyotype of Aspergillus nidulans has been obtained using contour-clamped homogeneous electric field gel electrophoresis. Six chromosomal bands were separated, with two of the bands migrating as doublets. Using the Schizosaccharomyces pombe and Saccharomyces cerevisiae chromosomes as size standards, we estimate the sizes of the chromosomes to be between 2.9 and 5.0 megabase p...

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DNA replication is precisely coordinated with other cell cycle events to occur once per cell cycle (reviewed by Nasmyth, 1996). The cell achieves strict control over S phase by mobilizing a complex of proteins which activate DNA synthesis at discrete chromosomal origins of replication. A six-protein origin recognition complex (ORC) binds to origins constitutively and serves as an assembly site ...

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ژورنال

عنوان ژورنال: Genetical Research

سال: 1960

ISSN: 0016-6723,1469-5073

DOI: 10.1017/s0016672300000434