Constitutive heterochromatin
From Wikipedia, the free encyclopedia
 |
This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009) |
Constitutive heterochromatin domains are sections of DNA that occur throughout the chromosomes of eukaryotes, but particularly at the centromeres and telomeres. They often consist of very highly condensed, repetitive DNA and are largely transcriptionally silent. These regions normally appear darkly stained in karyograms.
Unlike facultative heterochromatin, constitutive heterochromatin is never converted back into euchromatin. The regions of DNA that exist as constitutive heterochromatin will be the same for all cells of a given species.
Constituitive heterochromatin is stained specifically with the C-banding technique.
 |
This genetics article is a stub. You can help Wikipedia by expanding it. |
