heterochromatin

/het-er-uh-kroh-muh-tin/US // ˌhɛt ər əˈkroʊ mə tɪn //UK // (ˌhɛtərəʊˈkrəʊmətɪn) //

异染色质,外染色质,杂色质,杂色性

Definitions

n.名词 noun

Large portions of the DNA in the nucleus are classified as heterochromatin because they are more compact and generally not expressed as proteins.
These droplets can fuse with each other, possibly providing a mechanism for compacting heterochromatin inside the nucleus.
Collectively those inactive, tightly guarded parts of the genome are known as heterochromatin.