the reaction of dimethyl sulfate with ribosomal rna , both in intact subunits and after isolation from the subunits , has indicated that approximately half of the rna in 30s and 50s subunits is exposed on the surface of the ribonucleoprotein complexes , and that no large sections ( extended sequences ) of 16s rna are concealed in the 30s subunit .
C0035701
ribosomal rna
C0035668
rna