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词汇 euchromatin
释义

Definition of euchromatin in English:

euchromatin

noun juːˈkrəʊmətɪnyo͞oˈkrōməˌtin
mass nounGenetics
  • Chromosome material which does not stain strongly except during cell division. It represents the major genes and is involved in transcription.

    〔遗传〕常染色质。比较HETEROCHROMATIN

    Compare with heterochromatin
    Example sentencesExamples
    • Position-effect variegation results from the juxtaposition of euchromatin and heterochromatin by chromosome rearrangement or transposon insertion.
    • The wavy line represents euchromatin of chromosome 2.
    • Further, in most organisms there is a virtual absence of exchange in heterochromatin and a reduction of exchange frequencies in euchromatin that lies near chromosomal elements such as centromeres and telomeres.
    • This can be expected, since different chromosomes in a genome can have different organizations of genes, euchromatin, and heterochromatin.
    • The greater proximity of the centromere could cause suppression of recombination in the proximal euchromatin of fusion chromosomes.

Derivatives

  • euchromatic

  • adjective ˌjuːkrəʊˈmatɪkˌjukrəˈmædɪk
    Genetics
    • Relating to chromosome material which does not stain strongly except during cell division.

      〔遗传〕常染色质。比较HETEROCHROMATIN

      euchromatic genes
      Example sentencesExamples
      • This is due, in part, to the presence of large, complex blocks of duplicated genomic sequence at the boundary between centromeric satellite and unique euchromatic DNA.
      • In Drosophila, relocation of a euchromatic gene near centromeric or telomeric heterochromatin often leads to its mosaic silencing.
      • Numerous genes act to remodel and repress chromatin in heterochromatin and around euchromatic genes during development.

Definition of euchromatin in US English:

euchromatin

nounyo͞oˈkrōməˌtin
Genetics
  • Chromosome material which does not stain strongly except during cell division. It represents the major genes and is involved in transcription.

    〔遗传〕常染色质。比较HETEROCHROMATIN

    Compare with heterochromatin
    Example sentencesExamples
    • This can be expected, since different chromosomes in a genome can have different organizations of genes, euchromatin, and heterochromatin.
    • The wavy line represents euchromatin of chromosome 2.
    • The greater proximity of the centromere could cause suppression of recombination in the proximal euchromatin of fusion chromosomes.
    • Further, in most organisms there is a virtual absence of exchange in heterochromatin and a reduction of exchange frequencies in euchromatin that lies near chromosomal elements such as centromeres and telomeres.
    • Position-effect variegation results from the juxtaposition of euchromatin and heterochromatin by chromosome rearrangement or transposon insertion.
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