nucleic acid hybridization studies involving micrococcal nuclease derived monomer nucleosome dna fragments and purified ribosomal rnas indicate that the apparent degree of accessibility of the ribosomal genes to short-term nuclease hydrolysis varies as a function of the rate of ribosomal rna ( rrna ) transcription .
C0035553
ribosomal
C0035701
ribosomal rna