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euchromatin

American

[yoo-kroh-muh-tin] / juˈkroʊ mə tɪn /

noun

Genetics.

the part of a chromosome that condenses maximally during metaphase and contains most of the genetically active material.

euchromatin British

/ juːˈkrəʊmətɪn /

noun

the part of a chromosome that constitutes the major genes and does not stain strongly with basic dyes when the cell is not dividing Compare heterochromatin

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

euchromatic

adjective

Etymology

Origin of euchromatin

First recorded in 1930–35; eu- + chromatin

Example Sentences

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euchromatin

The euchromatin usually contains genes that are transcribed, with DNA packaged around nucleosomes but not further compacted.

From Textbooks ● Jun. 9, 2022

The tightly packaged region is known as heterochromatin, and the less dense region is known as euchromatin.

From Textbooks ● Jun. 9, 2022

Eukaryote chromosomes are wrapped around histone proteins that create heterochromatin and euchromatin, which is not present in prokaryotes.

From Textbooks ● Jun. 9, 2022

Unmethylated nuclease-sensitive DNA is in the “open” configuration – aka euchromatin, a state in which DNA can discharge its various roles.

From Scientific American ● Sep. 17, 2012

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023