the specific protein-synthesizing activity of 30-s subunits reconstituted from 30-s subunit proteins and heat-denatured 16-s rrna is about one third of that observed if unheated 16-s rrna is used and is comparable to the activity of 30-s particles isolated after dissociation of 70-s ribosomes in the presence of 0.1 mm mg2+ .
C0035701
rrna
C0035553
ribosomes