Assertion: nucleolus's structure | /r/HasProperty | categorized into constitutive heterochromatin
Facets:
value: further
type: MANNER
Source sentences:
text: This structure is further categorized into facultative heterochromatin, consisting of genes that are organized as heterochromatin only in certain cell types or at certain stages of development, and constitutive heterochromatin that consists of chromosome structural components such as telomeres and centromeres.