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Heterochromatin and chromosome aberrations [PDF]
Chromosoma, 1969 The chromosome breaking effect of mitomycin C, methyl methanesulfonate, maleic hydrazide, 8-ethoxycaffeine and gamma rays on the primary root meristematic cells of Nigella damascena was studied. All the agents tested except 8-ethoxycaffeine, produced relatively fewer aberrations, when compared to Vicia faba cells, though both the species have nearly ...
A. T. Natarajan, G. Ahnström
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Chromosoma, 1985
Comparative fluorescence studies on the chromosome of ten species of acridid grasshoppers, with varying amounts and locations of C-band positive heterochromatin, indicate that the only regions to fluoresce differentially are those that C-band. Within a given species there is a marked tendency for groups of chromosomes to accumulate heterochromatin with
Bernard John +3 more
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Comparative fluorescence studies on the chromosome of ten species of acridid grasshoppers, with varying amounts and locations of C-band positive heterochromatin, indicate that the only regions to fluoresce differentially are those that C-band. Within a given species there is a marked tendency for groups of chromosomes to accumulate heterochromatin with
Bernard John +3 more
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Chromosoma, 1999
The properties of heterochromatin are reconsidered in the context of our present understanding of gene silencing, telomeric and centromeric properties, position-effect variegation and X-chromosome inactivation. It is proposed that the chromatin in heterochromatic chromosomal regions is generally similar in its molecular composition to that in silenced ...
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The properties of heterochromatin are reconsidered in the context of our present understanding of gene silencing, telomeric and centromeric properties, position-effect variegation and X-chromosome inactivation. It is proposed that the chromatin in heterochromatic chromosomal regions is generally similar in its molecular composition to that in silenced ...
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The paradox of functional heterochromatin
BioEssays, 2004Although heterochromatin has been studied for 80 years, its genetic function and molecular organization have remained elusive. In almost all organisms, heterochromatin has been regarded as genetically inactive chromosome regions. However, from genetic and genomic studies in Drosophila melanogaster and other organisms including humans, it is now clear ...
DIMITRI, Patrizio +3 more
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NOR associations with heterochromatin
Cytogenetic and Genome Research, 1984Associations between nucleolus organizer regions (NORs) and non-acrocentric chromosomes were scored in 2,800 metaphase spreads from PHA-stimulated lymphocyte cultures (48 h) from 14 individuals. The preparations were both silver stained and C-banded.
J. W. Bennett +3 more
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Nature Reviews Molecular Cell Biology, 2012
The sequence-specific transcription factors PAX3 and PAX9 promote heterochromatin formation.
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The sequence-specific transcription factors PAX3 and PAX9 promote heterochromatin formation.
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Reinterpreting pericentromeric heterochromatin
Current Opinion in Plant Biology, 2006In fission yeast, pericentromeric heterochromatin is directly responsible for the sister chromatid cohesion that assures accurate chromosome segregation. In plants, however, heterochromatin and chromosome segregation appear to be largely unrelated: chromosome transmission is impaired by mutations in cohesion but not by mutations that affect ...
Christopher N. Topp, R. Kelly Dawe
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Heterochromatin and histone phosphorylation
Experimental Cell Research, 1978Abstract Histone phosphorylation and nuclear structure have been compared in cultured cell lines of two related species of deer mice, Peromyscus crinitus and Peromyscus eremicus , which differ greatly in their heterochromatin contents but which contain essentially the same euchromatin content.
S.S. Barham +3 more
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1967
Publisher Summary The concept of heterochromatin is related to the subject of sex chromosomes and to the phenomenon of sex chromatin. The term “heterochromatin― described a cytological concept, the material basis of the phenomenon of heteropycnosis. “Heterochromatin― became endowed with genetic characteristics. The idea associated with heterochromatin
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Publisher Summary The concept of heterochromatin is related to the subject of sex chromosomes and to the phenomenon of sex chromatin. The term “heterochromatin― described a cytological concept, the material basis of the phenomenon of heteropycnosis. “Heterochromatin― became endowed with genetic characteristics. The idea associated with heterochromatin
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Perinuclear DNA and heterochromatin
Experimental Cell Research, 1977Abstract We have analyzed how and to what measure DNA which replicates specifically at the nuclear membrane at the end of S phase (perinuclear DNA) correlates with heterochromatin. We found that, although perinuclear DNA can be distinguished in autoradiographs in two different patterns of labelling, these appear to constitute the same heterochromatic
D. Chiatante +3 more
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