footprinting of ribosomal protein s1 on the 49-nucleotide 3 ' terminal cloacin df13 fragment of 16 s rrna at physiological ionic strength , ph and temperature yielded no detectable protection of any nucleotides from subsequent attack by the single strand specific nuclease s1 , even at large excesses of ribosomal protein s1 .
C0035553
ribosomal
C0035701
rrna