Assertion: nucleus's nucleolus | /r/HasAspect | fibrillary center
Facets:
value: in higher eukaryotes
type: LOCATION
Source sentences:
text: In higher eukaryotes, the nucleolus is comprised of a fibrillary center involved in the transcription of the rDNA, the dense fibrillary component that contains the fibrillarin protein associated with rRNA processing, and the granular component that contains the nucleophosmin protein for ribosome biogenesis.