following a 3 hour in vivo labelling of cytoplasmic rna in rat liver with orotic acid-6-14c under conditions where ribosomal rna synthesis was suppressed , the proportion of labelled messenger-like rna released to the cytoplasm which contained polyadenylate ( poly ( a ) ) tracts was about 3.0 times higher in the livers of juvenile ( 50 day ) as compared to adult ( 180 day ) rats .
C0035553
ribosomal
C0010834
cytoplasm