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Chromosome material of different density from normal (usually greater), in which the activity of the genes is modified or suppressed.Compare with euchromatin
- ‘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.’
- ‘Thus, the density of genes in heterochromatin is about 1% of that in euchromatin.’
- ‘Studies of genes translocated to heterochromatin have provided insight into the factors that control chromatin states.’
- ‘Genes located in heterochromatin are transcriptionally silenced, irrespective of their own promoter sequences.’
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