subunits from cultured embryonic cells actively transcribing ribosomal rna contain only 70-74 % of the cistrons present in undigested wild-type dna , while subunits from adult erythrocytes not active in rna transcription contain close to 90 % of the ribosomal cistrons in native chromatin .
C0035701
ribosomal rna
C0035668
rna