heterochromatin [het΄ər ō΄krō′mə tin]
Biol. the portion of the chromatin that stains densely and contains few or no genes: cf. EUCHROMATIN

English World dictionary. . 2014.

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  • Heterochromatin — is a tightly packed form of DNA. Its major characteristic is that transcription is limited. As such, it is a means to control gene expression, through regulation of the transcription initiation.tructureChromatin is found in two varieties:… …   Wikipedia

  • heterochromatin — heterochromatin. См. гетерохроматин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Heterochromatin — Heterochromatin,   auch zwischen den Zellteilungen stärker anfärbbare Zonen der Chromosomen …   Universal-Lexikon

  • Heterochromatin — Heterochromatin, auch im Interphasekern kondensiertes Chromatin; stärker anfärbbar als das aufgelockerte ⇒ Euchromatin; wird in der Interphase erst nach dem Euchromatin repliziert; wird nicht transkribiert …   Deutsch wörterbuch der biologie

  • Heterochromatin — Kern einer humanen Zelle. Das Heterochromatin sind die Bereiche des verdichteten Chromatingerüsts im Karyoplasma einer Zelle. Hier liegt die Desoxyribonukleinsäure (DNA) in spiralisierter, an Histon und Nichthistonproteine gebundener… …   Deutsch Wikipedia

  • Heterochromatin — A genetically inactive part of the genome, heterochromatin was so named because it was chromosomal material (chromatin) that stained differently, more darkly, all through the cell cycle, than most chromosomal material (which was named… …   Medical dictionary

  • heterochromatin — The chromosomal regions that are condensed during interphase and at the time of nuclear division. They show what is considered an abnormal pattern of staining as opposed to euchromatin. Can be subdivided into constitutive regions (present in all… …   Dictionary of molecular biology

  • heterochromatin — /hɛtəroʊˈkroʊmətən/ (say hetuhroh krohmuhtuhn) noun chromatin which remains compact during mitosis. Sex chromosomes may consist entirely of heterochromatin. {hetero + chromatin} …  

  • heterochromatin — heterochromatinas statusas T sritis augalininkystė apibrėžtis Chromatino dalis, kuri interfazės metu labiausiai branduolyje yra kondensuota. atitikmenys: angl. heterochromatin rus. гетерохроматин …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • Heterochromatin, constituitive — Heterochromatin that is fixed and irreversible. Regions of constituitive heterochromatin are located at very specific spots in the genome (on chromosomes 1, 9, 16 and the Y chromosome, the tiny short arms of chromosomes 13 15 and 21 and 22, and… …   Medical dictionary

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