consistent with the inference that rnase iii cleavages are absolutely required for 23s rrna maturation , when 50s ribosomes from a strain deficient in rnase iii were incubated with a ribosome-free extract from a rnase iii+ strain , rrna species processed by rnase iii and species with normal mature 23s rrna termini were produced .
C0035553
ribosomes
C0035701
rrna