Assertion: nucleolus's structure | /r/HasProperty | dense string-like fiber
Facets:
Source sentences:
text: Instead, it is combined with proteins and organized into a precise, compact structure, a dense string-like fiber called chromatin.
text: More membraneless structures continued to be found, such as the nucleolus, a dense structure in the cell nucleus.
text: Instead, it is combined with proteins and organized into a precise, compact structure, a dense string-like fiber called chromatin.