part of DNA-templated transcription initiation transcription by RNA polymerase I transcription initiation at RNA polymerase I promoter https://github.com/geneontology/go-ontology/issues/23386 krc GO:0006361 GO:0001180 transcription initiation from RNA polymerase I promoter for nuclear large rRNA transcript transcription initiation from Pol I promoter Note that promoter clearance is represented as a separate step, not part_of either initiation or elongation. biological_process 2011-08-15T03:45:49Z transcription initiation from RNA polymerase I promoter Reactome:R-HSA-73854 A transcription initiation process that takes place at a RNA polymerase I gene promoter. Ribosomal RNAs (rRNA) genes are transcribed by RNA polymerase I.