Results 211 to 220 of about 19,515 (233)
Reaction of human heterochromatin and euchromatin to spermine [PDF]
Bulletin of Experimental Biology and Medicine, 1975 The frequency of occurrence of cell nuclei with X-chromatin and Y-chromatin, as well as with diffuse and coarse chromatin network was studied, using cultured human fibroblasts 47XXY and 47XYY, after treatment of the cell with spermin. This treatment failed to change the percentage of the nuclei with the X- and Y-bodies, but significantly increased the ...
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Chromosome Structure: Euchromatin and Heterochromatin
1987Publisher Summary This chapter discusses the terms “euchromatin” and “heterochromatin” that have long been familiar for expressing primarily the state of chromatin condensation during the cell cycle. The term “heterochromatin,” in particular, has been used to describe such chromatin or chromosome segments that did not go through the uncoiling process
Ram S. Verma, Arvind Babu
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Chromatin-associated RNA content of heterochromatin and euchromatin
Molecular and Cellular Biochemistry, 1975Chromatin from TLT hepatoma cells, mouse liver cells, and mouse brain cells was fractionated by differential centrifugation into a pellet, enriched with heterochromatin, and a supernatant, enriched with euchromatin. The pellet was found to contain more than twice as much of a particular species of chromatin-associated RNA per milligram chromatin DNA as
Jacob D. Duerksen, Izhak J. Paul
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Euchromatinization of mammalian nuclei
Medical Hypotheses, 2002This paper discusses a mechanism for converting heterochromatin into the more relaxed state of euchromatin. Actuation of such state conversion stems from disassembly of internal vesicles that are incapable of surviving when trapped within the inner chamber of mammalian nuclei.
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Interaction systems between heterochromatin and euchromatin inDrosophila melanogaster
Genetica, 1994The constitutive heterochromatin is still one of the major unsolved problems in genetics. In Drosophila melanogaster three genetic systems involving specific interactions between heterochromatic and euchromatic genetic elements are known: the Segregation Distortion, the crystal-Stellate and the abo-ABO systems.
PALUMBO G. +8 more
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Chapter 11 Isolation of Mammalian Heterochromatin and Euchromatin
1974Publisher Summary This chapter discusses the isolation of mammalian heterochromatin and euchromatin. One of the essential requirements for the isolation of relatively pure heterochromatin and euchromatin fractions from mammalian cells is the isolation of clean nuclei in which the architecture of the chromatin has not been significantly altered.
Jorge J. Yunis, Walid G. Yasmineh
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Replication of euchromatin and heterochromatin in a mealybug
Chromosoma, 1971Asynchronous DNA replication of euchromatic (E) and heterochromatic (H) chromosomes and heterochromatic B chromosomes (B) were studied in the mealybug, Pseudococcus obscurus Essig (Homoptera: Coccoidea). The study was carried out on mycetocytes of adult females and on spermatocytes of mid-second instar males by employing tritiated thymidine labeling ...
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Biochemistry and cell biology = Biochimie et biologie cellulaire, 2016
The euchromatin histone methyltransferases (EHMTs) are an evolutionarily conserved protein family that are known for their ability to dimethylate histone 3 at lysine 9 in euchromatic regions of the genome.
Jamie M. Kramer
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The euchromatin histone methyltransferases (EHMTs) are an evolutionarily conserved protein family that are known for their ability to dimethylate histone 3 at lysine 9 in euchromatic regions of the genome.
Jamie M. Kramer
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The Variable Condition of Euchromatin and Heterochromatin
1976Publisher Summary This chapter discusses the variable condition of euchromatin and heterochromatin. Several terms were used to describe late-replicating chromosome material, replacing the customary term heterochromatin which was introduced by Heitz. The varying degree of condensation of meiotic chromosomes was called heteropycnosis.
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A cytochemical study of euchromatin and heterochromatin in roots of Rhoeo discolor
Experimental Cell Research, 1970Abstract Comparative cytochemical analyses of euchromatin and heterochromatin in the nuclei of different tissues in root tips of Rhoeo discolor were made. Concentrations and quantities of DNA, histone and non-histone protein were determined microscopically by means of fluorescence, absorption, interference and volume measurements. The heterochromatic
A. Rosselet, Fritz Ruch
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