...contains all the major types of eukaryotic RNA genes: >1300 ( Stricklin et al. 2005 ) of these genes have been identified,
including 630 tRNAs, 78 snRNAs, and 17 snoRNAs. Of the rRNA genes, the 18S, 28S, and 5.8S are transcribed separately by RNA
polymerase I in the ∼55 copies of the 7.2-kb rDNA repeat...