label: 45S pre-rRNA is nucleolytically processed at site 2 (site 2b) to yield 30S pre-rRNA and 32S pre-rRNA (Homo sapiens)
label_lc: 45s pre-rrna is nucleolytically processed at site 2 (site 2b) to yield 30s pre-rrna and 32s pre-rrna (homo sapiens)