in the absence of 5s rna , particles are produced that have greatly reduced activity in ( a ) polypeptide synthesis directed by synthetic , as well as natural , messenger rna , ( b ) peptidyl transferase assay , ( c ) [ ( 3 ) h ] uaa binding dependent on peptide chain termination factor r1 , ( d ) g factor-dependent [ ( 3 ) h ] gtp binding , and ( e ) codon-directed trna binding assayed in the presence of 30s subunits .
C0035668
rna
C0035696
messenger rna