GO:0005730 nucleolus: current PTHR45903 PAINT places this at PANTHER:PTN000523093, seeded by SGD RRB1 itself, human GRWD1 (UniProtKB:Q9BQ67), and an unresolved UniProtKB:Q386K4 seed that is present in PAINT but absent from local PANTHER entry indexes. This is consistent with the cached Rpl3-chaperone literature and remains ACCEPT with NO_FAILURE_CORE.GO:0042254 ribosome biogenesis: current PTHR45903 PAINT places this at the same PANTHER:PTN000523093 node, seeded by SGD RRB1 and human GRWD1. The broad process transfer is biologically sound but less precise than the experimental yeast evidence: Schaper et al. reported that "Impairment of Rrb1p function results in decreased levels of free 60S ribosomal subunits" PMID:11728313. I left the row as MODIFY to GO:0042273 ribosomal large subunit biogenesis and added TERM_SCOPING_PROBLEM / GRANULARITY_MISMATCH.Searches on 2026-09-28 for Rrb1, RRB1, YMR131C, Saccharomyces, and yeast did not find newer direct yeast RRB1 studies from 2023-2026. The one 2020-2026 PubMed hit was Pillet et al. 2022, which extends the dedicated-chaperone model by showing that Rrb1 or Acl4 availability tunes nascent Rpl3/Rpl4 production: "the co-translational recognition of Rpl3 and Rpl4 by their respective dedicated chaperone, Rrb1 or Acl4, reduces the degradation of the encoding RPL3 and RPL4 mRNAs in the yeast Saccharomyces cerevisiae" PMID:35357307.