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单词 heterochromatin
释义

Definition of heterochromatin in English:

heterochromatin

noun ˌhɛtərəʊˈkrəʊmətɪnˌhedərōˈkrōmədin
mass nounBiology
  • Chromosome material of different density from normal (usually greater), in which the activity of the genes is modified or suppressed.

    〔植〕异染色质。比较EUCHROMATIN

    Compare with euchromatin
    Example sentencesExamples
    • The organization of DNA into euchromatin and heterochromatin is implicated in gene silencing.
    • Numerous genes act to remodel and repress chromatin in heterochromatin and around euchromatic genes during development.
    • Studies of genes translocated to heterochromatin have provided insight into the factors that control chromatin states.
    • Thus, the density of genes in heterochromatin is about 1% of that in euchromatin.
    • Genes located in heterochromatin are transcriptionally silenced, irrespective of their own promoter sequences.

Definition of heterochromatin in US English:

heterochromatin

nounˌhedərōˈkrōmədin
Biology
  • Chromosome material of different density from normal (usually greater), in which the activity of the genes is modified or suppressed.

    〔植〕异染色质。比较EUCHROMATIN

    Compare with euchromatin
    Example sentencesExamples
    • The organization of DNA into euchromatin and heterochromatin is implicated in gene silencing.
    • Studies of genes translocated to heterochromatin have provided insight into the factors that control chromatin states.
    • Numerous genes act to remodel and repress chromatin in heterochromatin and around euchromatic genes during development.
    • Thus, the density of genes in heterochromatin is about 1% of that in euchromatin.
    • Genes located in heterochromatin are transcriptionally silenced, irrespective of their own promoter sequences.
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更新时间:2025/6/19 16:58:23