likewise , the effects of these drugs on rrna processing resulted in their classification into two groups : toyocamycin , 5-fluorouracil , and tubercidin caused an abnormal accumulation of the 45 s precursor to rrna , while sangivamycin , 8-azaguanine , and 5-azacytidine did not cause an accumulation of 45 s rna .
C0035701
rrna
C0035668
rna