as discussed , the transient increase in rna levels in the adult , the lack of any changes in the rate of transfer of rna from the nucleus to the cytoplasm , and the decrease in rna levels in the 15-day neurons may be related to the presence of an unusual intranucleolar body within the nucleolus of hfmn that contains ribosomal precursors .
C0007610
nucleus
C0007609
nucleolus