| Dataset | COMPARTMENTS Curated Protein Localization Evidence Scores |
| Category | structural or functional annotations |
| Type | cellular component |
| Description | A structure found most metazoan nucleoli, but not usually found in lower eukaryotes; surrounded by the dense fibrillar component; the zone of transcription from multiple copies of the pre-rRNA genes is in the border region between these two structures. (Gene Ontology, GO_0001650) |
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2 proteins localized to the fibrillar center cellular component from the COMPARTMENTS Curated Protein Localization Evidence Scores dataset.
