within a six-component complex of poly ( u ) -programmed e. coli ribosomes with elongation factor tu , phe-trna ( phe ) ( at the a-site ) , trna ( phe ) ( at the p-site ) and the [ 14c ] gtp analog , mainly the ribosomal 23s rna and to a lesser extent the ribosomal proteins l17 , l21 , s16 , s21 and the ribosomal 16s rna were labeled by the reagent .
C0035553
ribosomes
C0035701
ribosomal