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.
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.